Windows 7: How to get rid of this error "application has stop working" ?

Application is actually a game .previously it was working perfectly. But now whenever i tried to open it, it gives that error "application has stop working" . i also tried uninstalling that game and installed it again but the problem persists . i m using windows 7 professional 64 bit on hp probook 4520s

Hello umairchang and welcome to Seven Forums. Not much info to go on but I'd try system restore to go back to a date/time prior to the problem starting.

System Restore

If system restore doesn't work it would help if you told us what game it is and gave the specs for your computer as well as any other information like what you were doing just before the problem occurred. Just as an example: Did you install any other programs? Update anything? Suffer a power outage?

When you get the application error message, click on View Details, and let us know the Fault Module Name. That will give us more information on what the root issue is here to avoid it in the future.