Stop Paying for Antivirus
Antivirus used to be non-negotiable — you bought a license, renewed it every year, and didn’t think too hard about why. That reflex has outlived its reason. The built-in stuff is good now, and for most people, a monthly third-party subscription is just paying for protection they already have.
One scope note before any of this: I’m talking about a personal laptop or home desktop, not a managed fleet. A business running centralized detection, unified policy, and a team watching every endpoint is solving a completely different problem than “should I renew this forty-dollar subscription” — enterprise EDR/XDR tooling isn’t the consumer antivirus this post means, and nothing here is an argument against having it.
Windows: Defender already does the job
Microsoft Defender has quietly gotten good — independent labs like AV-Test and AV-Comparatives routinely score it alongside, and sometimes above, the paid suites. It’s already running and keeps itself updated, no renewal email guilting you into anything.
Turn on Controlled Folder Access too, under Windows Security → Virus & threat protection → Ransomware protection. It stops unrecognized programs from touching files in folders you’ve protected — the exact thing ransomware needs to do to encrypt your documents.
A second opinion, not a subscription
If you still want a second scanner for peace of mind, install Malwarebytes' free version, but toggle off reporting to Windows Defender during setup. Leave it on and the two just echo each other’s findings. Turn it off and Malwarebytes becomes its own thing — something you open when a file feels off, rather than a second service quietly duplicating Defender’s job in the background. The free tier doesn’t even do real-time scanning, so this is the actual use case: an occasional second look, nothing more.
macOS: same story, different vendor
macOS has its own version of this baked in — XProtect catches known malware signatures, and Gatekeeper won’t run anything that isn’t signed and notarized by a developer Apple has vetted, unless you go out of your way to override it. Most Mac “infections” are someone clicking past that warning on purpose. Want a second opinion here too? Malwarebytes has a free Mac scanner — same deal, check it occasionally, don’t pay for it.
Linux: ClamTK, and honestly, not much to worry about
Linux sees a lot less malware in the wild — the package-repo model beats downloading random installers, and permissions aren’t handed out as freely as they are on Windows. It’s also just a smaller target. ClamTK, a GUI wrapped around the open-source ClamAV engine, handles the occasional check, and it’s genuinely handy if you’re scanning a file before passing it to a Windows user. It isn’t watching your system in real time — on Linux, that’s rarely what you actually need it for.
Before you run anything you’re not sure about
Nothing above replaces judgment about what you’re installing. If a download didn’t come from the developer’s own site or an official app store, run the installer through VirusTotal first — it checks the file against dozens of antivirus engines at once, in seconds.
Uploading a file there makes it visible to other researchers and vendors in VirusTotal’s own database — fine for a random installer, but skip it for anything with your own data in it.
Bottom line
None of this is exotic. The built-in tools on every major OS are good enough for what almost everyone actually runs into, and they’re free — no upsell, no renewal, nothing to remember to cancel. Keep a free on-demand scanner around for when something feels off, get in the habit of checking anything you’re unsure of before you run it, and put the subscription money toward something that isn’t already sitting on your machine for free.