Try these steps if you are unable to open Add/Remove Programs in the Windows 2000 Control Panel.

1. Click Start > Run and type regsvr32 mshtml.dll

2. When you receive the message that the DLL has been registered, click OK and perform the same steps for each of the following commands one by one under Start > Run:

regsvr32 shdocvw.dll -i
regsvr32 shell32.dll -i