While most free virus scanners can only spot obvious threats, they’re restricted to single-use scans and fail to deliver continuous defense. For thorough security (Malwarebytes stands out), as it thoroughly detects malware overlooked by other programs while running silent background scans. Many users pair their primary antivirus with Malwarebytes to enhance detection and broaden their protection coverage. Unfortunately (free scanners are reactive), scanning only after infections occur rather than preventing them beforehand.

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.

The Smart Firewall is the best of the five, detailed enough when you want to dig in and sensible enough by default that most people will never open it. The gap between the first-year price and the renewal price is wider in antivirus than in almost any other consumer software, and that’s where most of your money ends up going. There’s also one well-known antivirus that I strongly advise against installing, for reasons that have nothing to do with how well it catches malware. McAfee+ is the answer when the device count has genuinely got away from you, provided nobody needs parental controls. Bitdefender is the one I would install on an older machine without hesitating, because 11% CPU and 183 MB is roughly a third of what Norton asks and its 97.6% offline detection is the best here. Security software that cannot legally receive updates in your jurisdiction is unusable there whatever its scores say.

Testing revealed Norton’s malware detection performance.

However, its high cost is the primary reason it doesn’t rank at the top of the list. Malwarebytes is among the recommended tools, though I’d advise against installing it on mobile devices. To streamline your search, I’ve curated a selection of the best antivirus apps specifically for Windows PCs. If your new subscription doesn’t meet expectations (simply notify us), and you’ll automatically receive a complete refund. Our versatile plans include identity theft protection, a VPN, secure password management, and parental controls—all packaged affordably.

Beyond antivirus software, I strongly recommend applying Windows updates as soon as they’ Softmesa re released. No need to adjust settings or install random browser extensions. One of its features is Isolated Browsing, which creates a secure, isolated browsing environment to actively shield users from cyber threats. The platform earns praise for its robust security but faces criticism for being preinstalled on countless new laptops.

Though Microsoft’s built-in security effectively counters common malware, experts widely agree it’s insufficient alone to guard against all online dangers. Windows Defender alone isn’t enough for me—I rely on Windows 10 with sensitive business data and financial records. Over the past two years, we’ve earned 25 new awards, adding to the hundreds we’ve won since our founding in 1991—proving our reliability.

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 finds your information on data broker and people finder websites, and, if you’re on the right plan, lets you send data removal requests with a single click. I also research each company’s history for data breaches or instances of misusing customer data — ensuring that all of the companies on this list treat user data with care. I follow these tests up by installing and running each company’s additional cybersecurity tools to determine their speed, usability and effectiveness. Once upon a time, Avast was the gold standard of antivirus protection; it was the first thing folks in the know, including me — installed on our computers. You can also download AVG AntiTrack to block trackers across browsers you’re already using if you don’t want to switch browsers. Its robust protection — which comes preinstalled on all Windows devices, makes Microsoft Defender the best antivirus for most Windows users.

Safeguard your personal data and privacy with lightweight anti-malware and anti-ransomware tools that won’t slow you down. While some antivirus programs depend on firewalls, true protection requires spotting and blocking risky behavior instantly. Malware often conceals itself in downloads (fake software updates), or seemingly harmless applications—basic scanners frequently miss it. Malwarebytes provides a free scan to detect existing infections, with an option to upgrade for real-time protection and ongoing security. This means they might only uncover malware after it’s already caused damage instead of stopping it before installation.

Dropping it on a drive confirms that a scanner is switched on and reacting (which is worth doing once after installation), and tells you nothing whatsoever about how that scanner handles a real threat. Past eight or nine devices — Bitdefender’s Total Security Family at $79.99 also undercuts Norton Deluxe per device and includes the parental controls McAfee charges extra for. Bitdefender counts people (at 25 devices spread across five separate accounts), which is what you want when each person needs their own dashboard and their own settings. Engines get licensed and rebadged constantly, so a table listing twenty brands may contain closer to a dozen independent results. Bitdefender built its entire 2026 pitch around Scam Protection Pro, detecting and blocking rather than paying out.

For instance, the free version of Malwarebytes scans only on demand for malware and PUPs—it won’t monitor continuously like the paid version. In other words, it will take care of all your anti-malware needs, leaving Microsoft Defender to run only when needed. If you opt for third-party antivirus software (just ensure you disable any unnecessary), bulkier features they attempt to install. Windows 10 and Windows 11 come preinstalled with an antivirus program already active.