Things seem to be going okay actually, everything's working okay. I still get the occasional 'program has stopped working' error or a blue screen but the computer is usable. I can't do a repair install because my copy of windows seems to be broken so I will keep my computer like this until I can buy a new copy of Windows.
Thank you so much for your help and if I have other problems I will just open a new thread.
Thanks again,
Finn