This is likely caused by some corrupted driver file in your system.
I have corrected such by doing a "repair install" using the XP disk.
Boot fromt the cd. When the option comes up to install XP, press "R" on your keyboard to do the repair install.
Best of Luck
Any body can help please. My computer run OS Windows XP Pro SP2. After I reinstalled Windows XP for repairing OS problem, I cannot open Screen Saver tab on Display Properties dialog. Other tabs are OK. When I click on Screen saver tab, a dialog box appears with message:"Run a DLL as an App has encountered a problem and need to close." I click send report. The Display Properties closes. What happens to my computer? I higly appreciate your help. Thank you very much.