Windows Add Remove programs not working

Windows Add/Remove programs control panel applet does not load.  When viewing Task manager the program mshta.exe is there but doesn’t do anything.

Start a command session by going to Start, Run and typing
cmd

Enter each of the following commands (click OK to each confirmation that appears):
regsvr32 mshtml.dll
regsvr32 shdocvw.dll -i
regsvr32 shell32.dll -i

Close the command session by typing
exit

Then start add/remove from control panel.