I didn't expect the diagnose problems to work on that page, it's the manual intructions you need to follow...
Windows Vista
1. Click Start
, and then click All Programs.
2. Click Accessories, and then click Run.
3. Type regedit, and then click OK.
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User Access Control permission
If you are prompted for an administrator password or for a confirmation, type the password, or click Allow.
4. In the navigation pane, locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\C
ontrol\Class\{4D36E965-E325-11CE-BFC1-08002BE
10318}
5. In the right pane, click UpperFilters.
Note You may also see an UpperFilters.bak registry entry. You do not have to remove that entry. Click UpperFilters only. If you do not see the UpperFilters registry entry, you still might have to remove the LowerFilters registry entry. To do this, go to step 8.
6. On the Edit menu, click Delete.
7. When you are prompted to confirm the deletion, click Yes.
8. In the right pane, click LowerFilters.
Note If you do not see the LowerFilters registry entry, unfortunately this content cannot help you any further. Go to the "Next Steps" section for information about how you can find more solutions or more help on the Microsoft Web site.
9. On the Edit menu, click Delete.
10. When you are prompted to confirm the deletion, click Yes.
11. Exit Registry Editor.
12. Restart the computer.
By navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\C
ontrol\Class\{4D36E965-E325-11CE-BFC1-08002BE
10318}
it means in the left hand pane click on the plus sign next to HKEY_LOCAL_MACHINE then the plus next to SYSTEM, then the one next to CurrentControlSet...... and so on