What the five recommendations offer
Tom’s Guide’s choices address different priorities rather than identifying five interchangeable winners. Its assessments include installation, interface design, scanning, gaming performance and customer support.
| Product | Tom’s Guide category | Main attraction in its assessment | Main caution |
|---|---|---|---|
| Norton 360 Deluxe | Best overall | Broad security bundle and approachable interface | Renewal-price increase; platform-dependent features |
| Malwarebytes Plus | Best budget | Simpler protection package with a VPN | More noticeable resource use during testing |
| Bitdefender Total Security | Best for fraud protection | Comprehensive protection and modest gaming impact | Distinguish Total Security from Ultimate Security |
| Avast One | Best free | No-cost core protection | Separate paid extras |
| McAfee+ Premium | Best for families | Unlimited-device coverage | Longer full scan and renewal-price increase |
These are the publication’s editorial recommendations, not a unified laboratory ranking.
There is also one important correction: Tom’s Guide says Bitdefender lacks a quick scan, but Bitdefender’s own Total Security user guide explicitly documents Quick Scan, System Scan and custom scanning. That claimed limitation should not determine a purchase.
Performance scores are not protection scores
The biggest trap in antivirus comparisons is treating every number as a measure of malware detection. AV-Comparatives explicitly says its April 2026 performance test measures system impact—not protection effectiveness. A low impact score does not mean a product blocks more threats.
Its published impact scores included:
| Vendor | April 2026 impact score |
|---|---|
| McAfee | 3.3 |
| Norton | 5.3 |
| Avast | 5.5 |
| Bitdefender | 9.6 |
| Microsoft | 12.9 |
| Malwarebytes | 17.6 |
Lower scores indicate less measured impact within this particular comparison. The laboratory used Windows 11 on an Intel Core i3 system with 8GB of RAM and SSD storage, testing activities including file operations, application launches, browsing and office productivity. These are useful measurements, not promises about every PC.
Product names matter, too. The laboratory tested Norton Antivirus Plus, Avast Free Antivirus, McAfee Total Protection and Malwarebytes Premium—not every exact subscription named in the buying guide. Its results apply to the listed product versions; they should not be presented as validation of every feature in a differently named bundle.
The practical takeaway: use performance testing to investigate likely overhead, then evaluate protection separately. Antivirus shopping should not become a contest to find the fastest stopwatch.
Microsoft Defender belongs in the comparison
Windows users are not starting with an empty security toolbox. Microsoft Defender Antivirus is included in Windows, and Windows Security provides the interface for checking antivirus status and other protection areas. Buying a third-party subscription is therefore a choice about replacement protection and additional services—not a prerequisite for having antivirus at all.
AV-TEST’s March/April 2026 Windows 11 evaluation provides a useful counterweight to commercial buying guides. Microsoft Defender earned the maximum 18 points across protection, performance and usability, receiving the laboratory’s Top Product designation. Bitdefender Total Security, Norton 360 and Avast Free Antivirus also achieved 18 points. Malwarebytes received 5.5 of six points for protection in that testing window.
Those findings do not establish that all products behave identically. They do establish that Windows’ built-in antivirus deserves a place in the decision. This was a particular two-month evaluation, not a lifetime guarantee or a substitute for comparing subsequent results.
Our assessment: start with the protection you already have, then identify a concrete reason to change it. “The subscription includes more things” is less persuasive than “these are services I need.”
Before switching, check Windows Security
On a personal Windows PC, Microsoft’s guidance supports a straightforward check:
- Search for Windows Security in Start and open it.
- Review the home page for protection warnings.
- Open Virus & threat protection to inspect antivirus status and available actions.
- Address recommendations before assuming that installing another suite is necessary. Microsoft uses green for no recommended action, yellow for a recommendation and red for an issue requiring immediate attention.
Microsoft says Defender Antivirus automatically turns off when another antivirus application is installed and active, then turns back on when that application is uninstalled. That expected handover is not a reason to disable Windows Security itself. Microsoft also advises against running multiple real-time antivirus products together because doing so can affect performance and cause errors.
For an organization-managed device, consult IT rather than replacing its security software: Microsoft notes that management policies can restrict Windows Security features.
The buying decision
Tom’s Guide’s five-product shortlist offers a starting point, not an obligation to subscribe. The stronger decision combines protection evidence, acceptable performance on your hardware, the exact package’s features and its ongoing cost.
Before paying, write down what you actually want to improve. If the answer is simply “I need antivirus,” inspect Windows Security first. If the answer involves additional services, compare those services individually—and make the renewal terms part of the decision, not an unpleasant anniversary surprise.