To remove it properly.
1. Login as an user with "administrative" rights.
2. R-click on the "Command Prompt" shortcut in Tools-->Accessories, then RUN AS ADMINISTRATOR. This is to force admin execution.
3. Now in the commandline type this in:
Prompt> dism /online /cleanup-image /spsuperseded
Hit Enter to execute. You should see something like the screenshot#1 below.
For Windows VISTA, use this command at the command prompt: