SOULTION EASY!

You have a corrupted file:

1. Go to Start
2. Go to Find
3. Type in ratings.pol
4. Locate file
5. Highlight - right click - RENAME to ratings.old
6. Click APPLY and OK
7. Close Explorer
8. Re-open Explorer and change Content Tabs as you tried before

Sincerely,

Gargoyle

HAVE FUN!