HELP! Windows/AVAST compatability

Hey!

First time posting.

I have experienced a lot of pop ups and random things the last few weeks. I have just looked at my security panel (Windows 8) and it says that my current version of AVAST isnt compatible with the version of Windows (8.1) although my AVAST is completely up to date.

Am i missing something?

Thanks!

What exact version of avast do you have ?