smurphus

I have been having a problem with running games for the past few days. Every time I try to play a game it runs for about 10 minutes before the game exits to windows with an error box saying the game need to stop needed to stop with no explanation.
‘biahh.exe has stopped working
A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available.’
The system has also blue screened once at this point.
This was not an issue before Tuesday (28th July).
I have attempted to reinstall game and this has not worked.
My system is –
Windows Vista Home Basic
AMD Athlon 64 X2 Duel Core Processor 6000+
2.00GB RAM
ATI Radeon HD4850 Series

Yesterday I installed Brothers in Arms Hells Highway which needs a CD-Key and online verification and my system did not ask for either of these and installed the game, I am wondering if this may be related to the issue.
Thankyou in advance

This is a recurring problem and is happening with games which have been working fine previously.