Ahhh, I see your problem.
You are using Wndows.
It is a relatively easy fix:
http://fedora.redhat.com/In case that particular solution does not appeal to you, you can try to uninstall all those games, then re-install them one-by-one while testing & looking for subtle signs of instability (like the BSOD).
I'm sure plenty of others will give some hints. In the end, you might be best advised to backup all your data worth backing up, reformat your HD and re-installing your apps.
Windows has a tendency to take its cue from Lt Calley: sometimes you have to destroy an installation to save it.
BTW, before you re-install your Win OS & apps, be sure you have a CD with SP2 & other critical security updates handy. Keep your box off the net while installing the OS and make your first app installs your virus protection SW, several of the freely-downloadable anti-spyware tools, and your firewall. THEN get on the net & finish installing apps.
Good luck.