goes back to desktop when trying to play a game

From: brent (bmcguire24_at_msn.com)
Date: 04/27/04 

Date: Tue, 27 Apr 2004 13:41:03 -0700

when im trying to play games on the computer my computer goes back to the desktop screen it says the game is running but when i click on it it goes to a black screen then back to desktop ive even tried to change screen resolutionand screen size.