NOTE: Other Add/Remove Programs applet problems are documented at:

Tip 2764. Windows 2000 Add/Remove Programs tool displays incorrectly?
 
Tip 6002. You cannot Add or Remove Programs in Control Panel?
 
Tip 3860. Windows 2000 'Add/Remove Programs' issues Mshta.exe error?
 
Tip 4157. The Add/Remove Programs tool displays as multiple dialog boxes?
 
Tip 6032. The Windows 2000 Add/Remove Programs applet does NOT open?
 
tip 10045. Add/Remove Programs applet reports 'Object doesn't support this property or method'?
 

If you installed Microsoft Internet Explorer 5.5 or 6.0, the Add/Remove Programs tool may hang or misbehave.

Generally, re-installing Internet Explorer 5.5 or Internet Explorer 6 will resolve the problem.