I was having problems with my cd/dvd drive recognizing any disc at all. So I was chatting with a Dell support person who told me to do the following:


Clearing upper lower filters:
1. Click the Start button, click Run.
2. In the Open box, type Regedit, and then click OK.
3. Click the plus sign (+) next to HKEY_LOCAL_MACHINE.
4. Click the plus sign (+) next to SYSTEM.
5. Click the plus sign (+) next to CurrentControlSet.
6. Click the plus sign (+) next to Control.
7. Click the plus sign (+) next to Class.
8. Click {4D36E965-E325-11CE-B}
9. On the right side of the window, click Upper Filters.
10. Click Edit on the menu bar. Click Delete, and then click OK.
11. On the right side of the window, click Lower Filters.
12. Click Edit on the menu bar.
13. Click Delete, and then click OK.
14. Click File, and then click Exit.
15. Restart the computer normally.

The problem is that I may have deleted all upper and lower filters with that same heading 4D36E965-E325-11CE-B.......
Now my dimension 8400 won't allow the mouse to work(I have a Dell wireless keyboard and mouse)appearently there is no problem with the driver but just will not work! Tried a different mouse ..sees it but it too will not work.
Dell reps no help...replacing keyboard and mouse. The other option is the nukclear one.
Help me please!!!