If this ^^
is a genuine enquiry, then it would seem to be off-topic.
In any event, I would suggest that, if you have a Windows-based PC, then you don't need to pay anything
for a 1st-class AV (Anti-Virus) program. You can get MSE
- Microsoft Security Essentials
MSE is available for Win7, and in Windows 8, 8.1 and 10 it seems to come by default bundled with the Firewall as Windows Defender
- it is included as a selectable option, part of the operating system. All you need to do is enable it, though "FREE" installs of Symantec/Norton AV on OEM machines seem to block the user from doing that until Symantec/Norton AV itself has been expunged.