Some info most at Microsoft will NOT give, about how to delete stubborn files/folders. The reason they won't delete is b/c the only user/account that has FULL permission to do so is someone called the "TrustedInstaller", which is not even the owner of the computer/Installer of Windows!!!
I've done this to delete stubborn screensavers & fonts the people at MS think that only the "TrustedInstaller" should have permission to do. Here's what needs to be done: Take Ownership Shortcut
1. R-click the file you want deleted, choose Properties & select the Security tab.
2. Under Permission for SYSTEM, click Advanced.
3. Select the Owner tab & click Edit.
4. UAC will pop-up (or not)
5. Choose your User & click Apply, then OK & OK (back to file/folder's Properties box).
6. Still at the Security tab, click Edit under Group/user names.
7. UAC will pop-up (or not)
8. Select same group/user as in #5 above.
9. Under Permissions for SYSTEM choose Full Control - Allow.
10. Click Apply & Ok out of Properties. Now the file/folder should delete no problem.
I also used the Orb to search the whole computer for other instances of the file. For instance, the Ribbon screensaver, that I got rid of; was also found in multiple folders in the C:\Windows\winsxs folder. Once those files were deleted, the folders they were in were also deleted. No problems have come up for me since deleting some screensavers & fonts this way. Please note: only delete fonts that are set to 'HIDE' in the Fonts folder! Important!