Uninstall and reinstall MS Paint in Windows XP
You require the Windows XP CD-ROM to reinstall the Windows components such as Paint
Click Start, Run and type control appwiz.cpl,,2
(or, use Add/Remove Programs applet, Add/Remove Windows Components)
Double-click Accessories and Utilities
Uncheck Paint and click OK, OK.
Windows will now uninstall Paint brush. Now, insert your Windows XP CD in the drive and repeat the above procedure, but enable the Paint entry in the 4th step and click Next. The required files are extracted from Windows XP CD-ROM and Paint is now reinstalled.