Is Windows Defender enough, or do I need to buy antivirus?
For most people at home, yes, Microsoft Defender is enough. It comes free with Windows 11, is on by default and updates itself. Keeping Windows updated and being careful with downloads and links matters more than buying extra antivirus.
Microsoft Defender Antivirus is part of the Windows Security app. It scans files as you open them, checks downloads, and gets new protection through Windows Update. If you install another antivirus, Defender steps back so the two don't fight, and it turns itself back on if you remove the other one.
Macs also have built-in malware protection called XProtect, plus Gatekeeper, which checks apps before they open. Paid security suites can add extras like a password manager or a VPN, but you don't need them to stay protected from viruses. Be wary of pop-ups or emails pushing you to buy security software. Many of those are scams themselves.
- Open Start and search for Windows Security
- Choose Virus & threat protection and make sure it says no action is needed
- Turn on automatic updates in Settings, Windows Update
- Download apps only from the Microsoft Store or the maker's official site
How secure is your computer overall? Take the 2-minute checkup →
Built-in Protection Is Usually Enough
From the Updates & Antivirus course. Your computer already has antivirus. Here is what it does for free.
Try it on the practice computer Read the full lesson
The reading is free. The hands-on lab is part of Pro.