The Windows Defender vs Webroot debate centres on whether free built-in protection suffices or paid cloud-native security delivers better value. This comparison examines independent test results, UK-specific compliance requirements, verified pricing, and actual user experiences to help you choose between Windows Defender and Webroot. We’ll analyse the effectiveness of protection, system performance, privacy handling, and customer support quality to determine which solution genuinely delivers value for British households and businesses in 2024-2025.
Table of Contents
Is Windows Defender Better Than Webroot?
When comparing Windows Defender vs Webroot, Windows Defender demonstrates superior verified protection effectiveness whilst remaining completely free, making it the better choice for most UK users. Independent testing from AV-TEST awards Windows Defender 17.5-18 out of 18 points with TOP PRODUCT certification, whilst Webroot has not participated in AV-TEST evaluation since 2019, when it scored just 33.3% overall protection.
The Windows Defender vs Webroot comparison shows Windows Defender provides UK data residency, G-Cloud certification for government procurement, and NCSC endorsement. Webroot offers faster scans and a lighter system impact, but cannot verify its current protection effectiveness through independent testing, lacks UK compliance certifications, and suffers from documented customer support problems, with a 45.70 out of 200 satisfaction rating.
Current UK Pricing: Free vs Paid Subscription
Understanding the true cost difference between Windows Defender and Webroot helps UK households accurately budget for cybersecurity protection.
Windows Defender remains completely free as a built-in component of Windows 10 and Windows 11. All core protection features—real-time malware detection, ransomware protection via Controlled Folder Access, firewall integration, and SmartScreen phishing defence—come standard without subscription fees, renewal costs, or hidden charges.
Webroot SecureAnywhere requires annual paid subscriptions. Current UK pricing from verified retailers in November 2024 shows: Amazon UK offers Webroot Antivirus for three devices at £9.99 annually (promotional pricing), Mustech lists the same 3-device package at £22.99 annually (standard retail pricing), and the Complete 5-device package costs £34.99 annually. All prices include 20% VAT as required for UK sales.
The pricing variation between retailers is substantial—Amazon UK’s promotional rate represents a 56% discount compared to standard retail pricing. The official Webroot UK website does not prominently display specific pound amounts; instead, it directs customers to authorised retailers for purchase. Multi-year subscriptions offer additional savings; however, specific UK multi-year pricing is available only after proceeding to checkout.
For UK families with multiple Windows devices, Windows Defender eliminates recurring antivirus costs entirely. A household with three devices saves £9.99-£22.99 annually compared to purchasing Webroot subscriptions, compounding to £49.95-£114.95 over five years per household.
Independent Testing Results: Verified Protection vs Absence of Certification
The Windows Defender vs Webroot comparison reveals a critical difference in independent verification. Protection effectiveness claims require independent verification from recognised testing organisations to ensure products genuinely defend against real-world threats.
Windows Defender: Consistent Top Performance in 2024-2025 Testing
AV-TEST Institute results from June 2024 awarded Windows Defender Consumer 17.5 out of 18 points, qualifying it for the prestigious TOP PRODUCT certification, which requires a score of 17.5 or higher. Protection scores reached 5.5 out of 6 (industry average 5.0), with real-world zero-day threat detection at 99.8% in May and 99.3% in June 2024 across over 14,000 malware samples. Performance scored a perfect 6.0 out of 6.0, and usability achieved 6.0 out of 6.0 with minimal false positives.
The enterprise version demonstrated even stronger results in February 2024 testing—a perfect 18 out of 18 points with 100% detection rates on both zero-day samples and prevalent malware from the previous four weeks.
AV-Comparatives awarded Windows Defender five ADVANCED awards across seven test categories in 2024. Real-world protection testing from July through October 2024 demonstrated a 98.3% protection rate across 471 live malicious URLs, ranking equal fifth among 17 tested products. The Performance Test in September 2024 ranked Defender 13th out of 17 products, with an impact score of 18.9, and received an ADVANCED award despite having a moderate system impact.
Webroot: Absence from Major Independent Testing Since 2019
Webroot does not participate in current AV-TEST certification programmes. The last available AV-TEST evaluation, dated June 2019, shows overall protection at 33.3% (2 out of 6 points), performance at 91.7% (5.5 out of 6 points), and usability at 66.7% (4 out of 6 points). Webroot did not receive AV-TEST certification. The company last achieved accreditation in August 2013.
Webroot does not participate in AV-Comparatives’ public main-test series. The company joined AV-Comparatives in 2011 but ceased participation in public testing after 2012. AV-Comparatives confirms Webroot “did not join the public main-test series” and appears in no 2024 summary reports.
The only recent independent testing comes from SE Labs’ Q4 2024 report, which assessed Webroot at 97% total accuracy and 85% protection accuracy, ranking it 8th out of 10 products tested. Windows Defender achieved a total accuracy of 98% in the same test. In SE Labs Small Business Q1 2024 testing, Webroot scored 81% protection accuracy—last place out of five products—whilst Microsoft Defender for Endpoint achieved 100% alongside Kaspersky and ESET.
This absence from major independent testing means no verified data exists for the current Webroot versions’ detection rates, false positives, or advanced threat protection capabilities from recognised testing organisations.
System Performance Impact: Speed vs Resource Usage
The Windows Defender vs Webroot performance comparison shows distinct differences in resource consumption. Performance impact affects daily computer use, particularly for older systems with limited resources. PassMark testing from 2023 and independent user reports provide measurable comparisons between Windows Defender and Webroot.
Memory and CPU Consumption
The Windows Defender vs Webroot performance comparison shows Webroot uses 65.23 MB of RAM at idle and 129.06 MB during active scanning, with an installation footprint of 27.80 MB. Windows Defender consumes 199.23 MB at idle and 590.26 MB during scans. For systems with 4GB RAM or less, this difference has a significant impact on the available memory for other applications.
CPU utilisation shows Webroot using less than 1% during idle periods and 20-30% during its brief, quick scans. Windows Defender shows 0.1-10% CPU usage during idle operation, but can consume 50-100% of available CPU resources during full system scans.
Scan Speed Differences
The Windows Defender vs Webroot scan speed comparison reveals significant differences. Webroot quick scans complete in approximately 15 seconds, with PassMark standardised testing showing 49.63 seconds for a 982 MB dataset containing 6,166 files. Full system scans typically finish within 2-5 minutes.
Windows Defender quick scans require 15-30 minutes, whilst full scans vary considerably. PassMark standardised testing measured 27.75 seconds for the same 982 MB sample, but real-world full scans on populated systems typically require 30 minutes to several hours, depending on data volume.
PassMark’s comprehensive testing awarded Webroot the overall #1 ranking, scoring 81 out of 100 points across all performance categories, with first-place finishes in boot time (4.88 seconds), installation speed (4.18 seconds), and RAM usage during scanning. Windows Defender ranked third with 63 out of 100 points.
For users with older hardware, the performance difference between Windows Defender and Webroot becomes more significant. Systems with 4GB RAM or older CPUs may experience slowdowns with Windows Defender’s background operations, especially during periods of Windows Update. Webroot’s cloud-offloaded processing prevents these resource bottlenecks.
Protection Features: Ransomware, Phishing, and Firewall Capabilities
When evaluating Windows Defender vs Webroot for protection features, understanding each product’s mechanisms helps evaluate their practical security value beyond marketing claims.
Ransomware Protection Approaches
The Windows Defender vs Webroot ransomware protection comparison shows different methodologies. Windows Defender provides Controlled Folder Access, monitoring applications attempting to modify files in protected directories, including Documents, Pictures, Videos, Music, Desktop, and Favourites. Unauthorised applications cannot modify protected files without explicit user authorisation, proactively blocking ransomware encryption. Whilst disabled by default, requiring user activation, once enabled, it provides consistently strong ransomware defence with behavioural monitoring and cloud threat intelligence integration.
Independent testing shows varied results for Webroot’s ransomware protection. SoftwareLab testing found 39% of ransomware attacks blocked (7 out of 18 simulated attacks), FindMySoft reported 68% blocking (15 out of 22 attacks), and SafetyDetectives measured 24% detection rate. Official Webroot documentation acknowledges “no endpoint security solution will offer 100% prevention and protection from crypto-ransomware.”
Phishing and Web Protection
The Windows Defender vs Webroot phishing protection comparison reveals different effectiveness levels. Windows Defender’s Microsoft Defender SmartScreen provides cloud-based anti-phishing checks, URL analysis for phishing indicators, dynamic blocking of reported phishing sites, and warnings before accessing suspicious sites. SmartScreen integrates natively with Microsoft Edge and provides Windows-level protection for other browsers. Enhanced Phishing Protection in Windows 11 monitors password entry on suspicious sites.
Webroot offers Web Threat Shield browser extensions for real-time URL checking and blocking malicious websites before they are loaded. Testing results vary: SafetyDetectives found 90% phishing site blocking (9 out of 10), SoftwareLab measured 80% (8 out of 10), whilst Cybernews reported 50% (5 out of 10). Web protection features are not included in all Webroot plans.
Firewall Functionality
The Windows Defender vs Webroot firewall comparison shows dramatically different capabilities. Windows Defender Firewall offers comprehensive bidirectional stateful firewall functionality, including inbound and outbound traffic filtering, three distinct network profiles (Domain, Private, and Public) with varying security settings, and extensive configuration options through the Windows Defender Firewall with Advanced Security console. Advanced users can create granular rules for specific applications, ports, and IP addresses.
Webroot provides only outbound traffic monitoring, explicitly designed to complement Windows Firewall rather than replace it. The architectural approach assigns Webroot to monitor outbound connections whilst Windows Firewall handles inbound protection. Configuration options are limited compared to those of Windows Defender Firewall.
Privacy and UK Compliance: Data Residency Matters
Windows Defender data collection policies provide clear documentation across multiple telemetry levels. Required diagnostic data includes device configuration, hardware specifications, OS version, memory, network connections, reliability metrics, and Windows Update status. Optional diagnostic data adds browser activity, application usage, performance logs, and enhanced error reports. Security-specific data includes reports from malicious software removal tools, Windows Defender detections, suspicious file information, and IP addresses when threats are detected. SmartScreen collects URLs visited for real-time threat checking.
Crucially, Windows offers configurable telemetry levels: Security (minimal data, available only in Enterprise/Education editions), Required/Basic (standard for consumer versions), and Optional/Full (default for consumer editions). Enterprise customers can reduce collection to the Security level, sample submission can be disabled or set to prompt before sending, and Group Policy controls provide extensive configuration options. While complete disabling is unavailable on consumer editions, users maintain substantially more control than with competing cloud-native solutions.
Webroot data collection presents serious privacy concerns for UK users. The privacy policy confirms collection of network and internet information (IP addresses, URLs and domain names of websites visited, applications or files attempting network access), device information (operating system, MAC address, device ID, browser type, location information), account data (name, addresses, email, phone, username, Windows username), usage data, potentially malicious files uploaded to cloud for analysis, and transaction data.
The critical issue emerges from Webroot’s 99% cloud-based architecture, requiring continuous data transmission to Webroot servers for protection to function. File signatures are transmitted continuously to the cloud for real-time checking. The system provides minimal local protection when offline. Continuous connection is required for optimal operation. Control options are severely limited—users can disable “Allow files to be submitted for threat research” but cannot opt out of other data collection, including URLs, IP addresses, and Windows usernames. No granular privacy controls exist, and the product cannot function effectively without cloud connectivity.
The AV-Comparatives 2018 report specifically flagged Webroot for invasive data collection compared to competitors. Community concerns centre on collecting Windows usernames without clear justification, mandatory URL and browsing data collection without an opt-out mechanism, and reported instances of privacy contact emails being ignored. For UK users prioritising data minimisation under GDPR Article 5(1)(c), Webroot’s continuous data flow architecture raises fundamental compliance questions.
Data storage locations and residency demonstrate why the UK public sector and regulated industries favour Microsoft. Windows Defender stores data based on tenant geolocation. UK organisations specify UK data residency through tenant location configuration, with Microsoft operating dedicated data centres in London, Cardiff, and Durham. EU tenants have data processed within the EU Data Boundary. Pseudonymized data may be stored in US central systems, but primary customer data remains in specified regions. Microsoft provides comprehensive documentation of exact data locations, with Defender for Endpoint supporting storage in the UK, EU, US, Australia, Switzerland, India, or UAE datacenters.
Webroot does not provide public documentation of specific data centre locations. Presumed US-based given Colorado headquarters, no UK or EU data residency option is publicly documented, cloud provider specifications are unavailable, and data processing locations remain undisclosed. This lack of transparency creates immediate compliance challenges for UK organisations requiring data sovereignty guarantees.
The UK government’s alignment heavily favours Windows Defender. The National Cyber Security Centre explicitly recommends built-in protection, stating “If you switch on this built-in antivirus, you’ll instantly be safer” with specific mention of Windows Defender as the built-in option. NCSC guidance warns that third-party antivirus products “often come with free trials but be aware that when trial expires, you’ll have to pay” and notes “Separate antivirus products won’t always work alongside built-in antivirus software and could even stop it from working completely.” The message clearly encourages users to opt for free, integrated protection over paid third-party alternatives.
Windows Defender achieves UK G-Cloud 13 certification (enabling government procurement), UK OFFICIAL standard compliance, NHS Digital Data Security and Protection Toolkit approval, and widespread deployment across the Ministry of Defence, NHS, and local councils. The product meets ICO requirements, supports GDPR data processor configuration for Enterprise customers, and complies with the Data Protection Act 2018 as the UK’s GDPR implementation.
Webroot is not G-Cloud certified, lacks UK OFFICIAL certification, has no NHS approval, and faces higher procurement barriers for UK public sector organisations. Financial services organisations may struggle with FCA data localisation expectations, healthcare organisations cannot rely on NHS approval pathways, and legal services firms face SRA data protection requirement challenges. The combination of unclear data residency, continuous US data transmission, and limited user control creates medium-to-high regulatory risk for UK organisations compared to Windows Defender’s low-risk profile.
UK organisations require clear data handling policies and compliance with British data protection regulations when selecting cybersecurity products.
Data Collection and User Control
The Windows Defender vs Webroot data collection comparison reveals significant differences in user control. Windows Defender collects required diagnostic data, including device configuration, hardware specifications, OS version, and reliability metrics. Security-specific data includes reports from malicious software removal tools, Windows Defender detections, suspicious file information, and IP addresses when threats are detected. SmartScreen collects URLs visited for real-time threat checking.
Windows provides configurable telemetry levels: Security (minimal data, Enterprise/Education editions only), Required/Basic (standard for consumer versions), and Optional/Full (default for consumer editions). Enterprise customers can reduce collection to the Security level, whilst sample submission can be disabled or set to prompt before sending.
Webroot’s privacy policy confirms the collection of network and internet information (IP addresses, URLs and domain names of websites visited, applications or files attempting network access), device information (operating system, MAC address, device ID, browser type), and account data. The 99% cloud-based architecture requires continuous data transmission to Webroot servers for protection to function. File signatures are transmitted continuously to the cloud for real-time checking. Users can disable “Allow files to be submitted for threat research” but cannot opt out of other data collection including URLs, IP addresses, and Windows usernames.
UK Data Residency and Government Certification
The Windows Defender vs Webroot UK compliance comparison shows substantial differences. Windows Defender stores data based on tenant geolocation. UK organisations specify UK data residency through tenant location configuration, with Microsoft operating datacentres in London, Cardiff, and Durham. EU tenants have data processed within the EU Data Boundary. Microsoft provides comprehensive documentation of exact data locations.
Webroot provides no public documentation of specific data centre locations. No UK or EU data residency option is publicly documented, and data processing locations remain undisclosed.
Windows Defender achieves UK G-Cloud 13 certification, enabling government procurement, UK OFFICIAL standard compliance, NHS Digital Data Security and Protection Toolkit approval, and widespread deployment across the Ministry of Defence, NHS, and local councils. The product meets ICO requirements and complies with the Data Protection Act 2018, as the UK’s GDPR implementation.
Webroot is not G-Cloud certified, lacks UK OFFICIAL certification, and has no NHS approval. The combination of unclear data residency, continuous data transmission, and limited user control creates higher procurement barriers for UK public sector organisations compared to Windows Defender’s verified compliance.
NCSC Guidance on Built-In Protection
The National Cyber Security Centre explicitly recommends built-in protection, stating “If you switch on this built-in antivirus, you’ll instantly be safer” with specific mention of Windows Defender as the built-in option. NCSC guidance notes that third-party antivirus products “often come with free trials but be aware that when trial expires, you’ll have to pay,” and that “Separate antivirus products won’t always work alongside built-in antivirus software and could even stop it from working completely.”
Customer Support and User Experience
The quality differences in customer support between Windows Defender and Webroot significantly impact the total ownership experience beyond the initial product selection.
Customer Satisfaction and Support Quality
Windows Defender provides support through Microsoft’s standard channels, including online documentation, community forums, and Windows’ built-in troubleshooting tools. Tom’s Guide rated Windows Defender as providing “good malware protection” in October 2024, with AV-TEST awarding a perfect 6 out of 6 scores for usability in January-February 2025 testing. TechRadar notes “better detection rates than some paid solutions” whilst acknowledging “very basic features.”
Webroot customer support receives notably poor ratings. CustomerServiceScoreboard rates Webroot at 45.70 out of 200 points with “Disappointing” classification, ranking #209 out of 1,024 companies surveyed. Trustpilot shows 3.7 out of 5 stars across 879 reviews, with the majority of concerns focused on slow response times, billing issues, including unauthorised charges, and difficult cancellation processes.
UK-specific support availability shows business customers receiving 24/7 support via a UK toll-free number (+44 808 101 7260) with an Ireland-based European support centre. Home office customers face weekday-only hours (7 AM to 7 PM Mountain Daylight Time, converting to approximately 2 PM to 2 AM GMT/BST) with limited weekend coverage. The timezone mismatch means UK home users calling during evening hours may find support unavailable.
Installation and Uninstallation
Windows Defender requires no installation—pre-installed with Windows 10/11, automatically enabled, and protecting from first boot with zero user configuration required. The product cannot be uninstalled, only disabled by installing an alternative antivirus.
Webroot installation completes quickly (approximately 30 seconds) with minimal system requirements. However, uninstallation presents documented problems, with users often reporting difficulties that require separate Webroot removal tools. When standard removal fails, third-party uninstaller utilities are needed.
UK Threat Landscape: What Protection Do You Actually Need?
Understanding current UK cybersecurity threats helps evaluate whether antivirus products effectively address the real-world risks that British users face.
The UK Government Cyber Security Breaches Survey 2025 (conducted from August to December 2024) documents that 43% of UK businesses experienced cybersecurity breaches or attacks in the previous 12 months, affecting approximately 612,000 businesses. Phishing attacks represent 85% of all violations or attacks experienced, affecting 37% of all UK businesses. Impersonation attacks reached 34% of affected organisations.
Ransomware threats have doubled from 2024 to 2025, increasing from under 0.5% to 1% of all UK businesses affected—approximately 19,000 businesses experiencing ransomware incidents. The NCSC identifies ransomware as “most pervasive cyber threat” with 317 pre-ransomware notifications in 2024. The NCSC 2024 Annual Review documents 430 incidents requiring NCSC support, with 12 incidents reaching maximum severity—triple the previous year.
For home users, this threat landscape emphasises the need for strong anti-phishing protection, addressing 85% of attacks; real-time malware detection with high effectiveness; ransomware protection with rollback capabilities; and regular updates countering evolving threats.
Compatibility: Can Windows Defender and Webroot Work Together?
Understanding whether Windows Defender and Webroot can coexist helps users consider layered protection. Some users consider running multiple antivirus products simultaneously for layered protection, though this approach requires careful configuration.
When Webroot is installed on Windows 10/11, Windows Defender automatically disables its real-time protection per Windows behaviour, with Webroot becoming the primary active antivirus. However, Windows Defender remains available for periodic manual scans. Windows 10 Anniversary Update onwards allows Webroot to run continuous real-time protection whilst Windows Defender performs periodic scans only without conflicts, providing an additional security layer with different detection methodologies.
Both Windows Defender and Webroot fully support Windows 10 (32-bit and 64-bit) and Windows 11 (64-bit, including ARM64 except for Webroot Total Protection). An installation limitation exists for Windows S Mode—users must disable S Mode before installing Webroot.
Multi-Device Coverage for UK Households
The Windows Defender and Webroot multi-device approaches differ significantly. Webroot offers 1-device, 3-device, and 5-device configurations. Webroot Internet Security Complete includes 10-device family packs protecting entire households. The same keycode works across all devices, including any combination of Windows, macOS, Android, iOS, and Chromebook, with management through a web-based console.
Windows Defender covers unlimited Windows devices at no additional cost since it is included with Windows licensing. Households with multiple Windows PCs receive complete protection on each device without per-device subscription fees. Cross-platform coverage requires alternative solutions, as Windows Defender does not extend to macOS, Android, or iOS devices.
Which Should UK Users Choose in 2024-2025?
The Windows Defender vs. Webroot comparison, based on independent testing, UK compliance, performance, and customer experience, provides clear guidance for different user scenarios.
Windows Defender delivers verified protection effectiveness through consistent TOP PRODUCT awards from AV-TEST (17.5-18 out of 18 points), excellent real-world protection rates (98.3-100%, depending on the test methodology), and comprehensive features, including ransomware protection, phishing defence, and full firewall functionality. UK-specific advantages include G-Cloud certification, enabling government procurement, UK OFFICIAL standard compliance, UK data residency with data centres in London, Cardiff, and Durham, and explicit NCSC endorsement. The product requires zero installation, configuration, or ongoing cost.
Webroot offers genuine performance advantages, including 15-second scans, minimal RAM usage of 65 MB, minimal CPU impact, and exceptional speed on older hardware. However, the Windows Defender vs Webroot analysis reveals significant concerns with Webroot: refusal to participate in AV-TEST or AV-Comparatives testing since 2012-2019, last available test showing 33% protection, no current verifiable evidence of protection effectiveness from recognised testing organisations, 99% cloud architecture requiring continuous data transmission, no UK data residency option, and customer support rated 45.70 out of 200 (“Disappointing”).
For UK households facing phishing attacks, which affect 85% of breach victims, and doubled ransomware threats, the Windows Defender vs Webroot choice favours Windows Defender’s proven protection, UK compliance, and zero cost for most users. Webroot merits consideration only where breakneck scan speeds constitute critical requirements and users accept unverified protection claims, or for supplementing Windows Defender on older systems with severe resource constraints, whilst understanding the lack of independent testing verification.