Hi and

to Pc-pals juedaz95.
What games is it you're trying to load?
There are possibly 2 things that could be wrong.
Either you have files still on HD belonging to the first installation. I would do a search and delete anything pertaining to the game. Uninstall game and re-install and see if that works.
Set your color to 16bit and see if that makes a difference.
Come back and tell us how you get on.
PS Also go to website of game and see if there are any patches needed to download.