Baz, I've just had to sort out my fathers laptop as well. Come home from uni and got me fixing his virus ruined PC.
http://forums.anvisoft.com/viewtopic-45-3821-0.htmlHave a look at that mate as it gives you a few options.
If I wasn't going back to Aber soon myself I'd have driven up and sorted it for you. Its not that big a problem really.
When you've got it sorted download the below;
Spybot Search & Destroy
AVG Free Anti Virus
Malwarebytes
Then for your browser make sure you have an AdBlock extension to stop adverts as they can often hijack your PC through cookies etc.
If you're downloading torrents - movies and so on then make sure you run a virus check on files you downloaded before opening or running them - these are often loaded with trojans or rootkits that can infect your system32 files.
If you watch streams of football where there are often pop ups - install this media player to watch free games - avoid these like the plague as they are spyware and malware infected pieces of shit.
Need any more help drop me a PM.