NOTE: See other Add/Remove Programs applet problems.
The Add/Remove Programs applet (Appwiz.cpl) of Control Panel displays no installed programs, or as a single line of text, or with a large blank space in front of the program entries.
When you open the Add/Remove Programs applet, you may see one of the following errors:
An unexpected error occurred. Class not registered
Object doesn't support this property or method res://appwiz.cpl/default.hta
For a resolution, see Microsoft Knowledge Base Article 266668 Add/Remove Programs tool displays installed programs incorrectly.