I'm having problem logging on to online games. I get a "microsoft C++ runtime error, abnormal program termination" I tried different games, and get the same results.
On some games I get this error as soon as I click the start icon, on other it loads to the logon screen and after I enter my login name and password, it crash. I installed the programs on a different computer and they work fine without any errors, so I know the CDs is not the problem.

The only differents between the two computer is one was preloaded with Windows XP and the other, the one I'm having problem with, had Windows 98 and I upgraded to XP.
Is there some way to fix this problem without formatting and re-installation?

Sys Specs:
AMD 2700
512 ram
Gforce FX 5700 ultra
40 Gig HD
Windows XP upgrade version