No mate do not leave any trace of any program's or games or utilities. Because it is one if them that's giving you the issue.
Simply wipe ur machine out totally and then install drivers for your motherboard and also install graphics driver .
Then leave it and just browse the Internet normally without downloading anything including java or flash.
Test it for about 24 hours and then see what happens , I'll guarantee u that it will work perfectly. Then when u start to put stuff back onto ur machine do it bit by bit and then I would say you will come across the infected software and u will know exactly
what it is that's upsetting your machine . So u know NOT to install that particular piece of software. However you will then have to re-install windows all over again.
It's very much trial and error mate.