https://www.avast.com/free-antivirus-download
The world’s most trusted antivirus
But just don’t take our word for it.
System requirements
We’re not demanding. All you need is a PC with Windows 10, 8.1, 8 or 7*, 1 GB RAM and 2 GB of hard disk space. And that’s it.
* Both the 32- and 64-bit versions, excluding Starter and RT editions.