Antivirus section

Everything you need to choose, set up and use antivirus on Windows, in the order most people need it.

Start here

1 · Choose

Free or paid? Choosing antivirus for Windows

Decide what protection you actually need.

2 · Set up

Set up Microsoft Defender properly

Turn on every useful built-in layer.

3 · Clean

How to remove malware from Windows

What to do if you think you are infected.

4 · Stay safe

Fake virus alerts

Recognise scareware before it fools you.

5 · Protect

Ransomware protection basics

Layers that protect your files, and what to do if they are locked.

Quick rules