While most free virus scanners offer only one-time scans and lack ongoing threat monitoring, a free tool can still flag obvious infections. For comprehensive protection, Malwarebytes stands out as the top choice, as it performs deep malware scans that other tools often overlook and operates silently in the background. Many users pair their primary antivirus with extra software like Malwarebytes to enhance scanning capabilities and broaden coverage. Unlike most free scanners, which merely detect threats after they appear, these tools fail to provide real-time defense.
Malwarebytes has high-value antivirus software, plus tools for protecting you from a myriad of online threats beyond malware, for affordable prices. Similarly, you can install the browser extension quickly and it automatically blocks spyware. You can easily perform a manual scan if you suspect malware has infected your device, and Microsoft Defender automatically runs scans when you’re not using your device. Norton’s parental controls make it a great option for parents, guardians and other adults who are responsible for children and want to monitor their device usage as well as keep them safe online.
Among the five, the Smart Firewall excels—it’s detailed enough for deep customization yet simple enough that most users rarely need to open it. The price gap between the first-year and renewal costs in antivirus software is far wider than in nearly any other consumer program, where most of your spending ultimately occurs. There’s one widely known antivirus I firmly advise against installing, though its malware detection isn’t the issue. McAfee+ is the ideal solution when device numbers have spiraled out of control, assuming no one requires parental controls. Bitdefender is the antivirus I’d install on an older machine without hesitation, as its 11% CPU usage and 183 MB memory footprint are roughly a third of Norton’s demands, and its 97.6% offline detection rate leads the pack. Security software that legally cannot receive updates in your region is effectively unusable there, regardless of its test scores.
Norton Malware Detection Results in Testing
But the main reason it’s not at the top of the list is that it’s expensive. Malwarebytes is one of them, but I wouldn’t recommend installing it on your smartphone. To save you time, I compiled a list of the best antivirus apps for Windows computers. If you’re not satisfied with your new plan, just let us know and you’ll receive a full refund. Our cross-platform plans also include identity protection, a VPN, password management, and parental controls all bundled at a reasonable price.
Beyond antivirus software, I strongly recommend installing Windows updates as soon as they’re released to keep systems Softmesa secure. You won’t need to adjust settings or add random browser extensions—just let it work. One key feature is Isolated Browsing, which creates a separate, secure browsing environment to shield users from online threats. Known for its powerful protection, the platform is also notorious for being preinstalled on countless new laptops.
Though Microsoft’s built-in security defends against common malware threats, experts widely agree that Windows Defender alone isn’t sufficient for full online protection.
Things like malicious downloads, fake software updates, and hidden programs that run when your computer starts are far more common on Windows systems than many people realize. Windows 11 has Smart App Control, which blocks unsigned and untrusted apps on clean installs, hardware features like TPM 2.0 and virtualization-based security (VBS) with HVCI that protect your credentials and kernel memory, and a blocklist against signed but flawed drivers. SecureLine VPN is a paid module (with a 60-day free version), and the installer offers Avast Secure Browser already ticked, so untick it if you don’t want it. If your laptop is getting old, or you’re the kind of person who notices when security software is running, this is the one to install. It goes straight at the fake tech support call, where someone claiming to be from “Microsoft” phones your parents, gets them to install a remote access app, then asks them to log in to their bank “to process a refund”, and nothing else on this list catches that. In June 2024 the US Department of Commerce barred Kaspersky from selling software or issuing updates to US persons on supply chain grounds, and the company withdrew from the market.
Most robust antivirus software for Windows
Personal Data Cleanup searches for your details on data broker sites and, on eligible plans, lets you submit removal requests with a single click. I also investigate each company’s past for data breaches or misuse incidents to ensure every brand on this list prioritizes user privacy. After testing, I install and run each company’s extra cybersecurity tools to evaluate their speed, usability, and effectiveness. At one point, Avast was the undisputed leader in antivirus protection—the go-to choice for tech-savvy users, including myself. Alternatively, you can download AVG AntiTrack to block trackers across your existing browsers without switching. With robust protection preinstalled on all Windows devices, Microsoft Defender is the best antivirus for the vast majority of Windows users.
Protect your personal data from online threats and maintain privacy with anti-malware and anti-ransomware that won’t slow you down. While some antivirus tools rely heavily on built-in firewalls, real protection comes from identifying dangerous behavior early and blocking it in real time. Malware often hides inside downloads, fake updates, or seemingly harmless programs, which means basic scanners can miss it. Malwarebytes offers a free virus scan that’s useful for detecting existing infections, with the option to upgrade to real-time protection if you want continuous security. That means they may find malware after it’s already caused problems, rather than stopping it before it installs.
Running a test scan on a drive verifies that the scanner is active and responsive—though this only confirms basic functionality, not how it handles real threats. Beyond eight or nine devices, Bitdefender’s Total Security Family at $79.99 offers better per-device pricing than Norton Deluxe and includes parental controls that McAfee charges extra for. Bitdefender supports up to 25 devices across five separate accounts, which is ideal when each user needs their own dashboard and settings. Due to constant licensing and rebadging, a list of 20 brands may actually reflect fewer than a dozen distinct results. Bitdefender’s 2026 marketing focuses entirely on Scam Protection Pro, prioritizing detection and blocking over payouts.
The free version of Malwarebytes only performs on-demand scans for malware and PUPs—unlike the premium version, it doesn’t run silently in the background. In other words, Malwarebytes handles all anti-malware tasks while Microsoft Defender remains inactive in the background. If you opt for a third-party antivirus, simply disable any unnecessary, bloated features they attempt to install. Windows 10 and Windows 11 come preinstalled with an active antivirus program.