Try this:
Click
Start and then click
All Programs.
Click
Accessories, and then click
Run.
Type regedit, and then click
OK.
If you are prompted for an administrator password or for a confirmation, type the password, or click
Allow.
In the navigation pane, locate and then click the following registry subkey:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}
In the right pane, click
UpperFilters.
You may not see the
UpperFilters entry. You do not need to remove UpperFilters.bak. Remove LowerFilters instead.
On the
Edit menu, click
Delete.
When you are prompted to confirm the deletion, click
Yes.
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.
On the
Edit menu, click
Delete.
When you are prompted to confirm the deletion, click
Yes.
Exit Registry Editor.
Restart the computer.
Good Luck
-RF
