I'm not sure what you meen by "exclude the Key". Don't delete the Key! You
want to delete Values (see below). Is that what you are trying to do?
Follow the instructions given here (Method 2):
http://support.microsoft.com/default.aspx?scid=kb;en-us;314060
Although the article mentions XP, the same registry keys are used by Vista.
In this Key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318},
note that the Key is identified in the LEFT-hand pane of Registry Editor.
The Values for that key are seen in the RIGHT-hand pane. The Values called
LowerFilters and UpperFilters are the Values that you want to select
(highlight) and delete. You can right-click on those two values to do that.
They will be in the same Key. If you only see one of those two Values, then
just delete the one.
If you want to back up the Key before you make a change, highlight the key,
and choose File from the menu, and then choose Export. Name it GoBack.reg.
Hopefully, though, you won't have to use your backup, and things will work
out. Should you want to undo your changes, just click on GoBack.reg.
If you don't find the Values noted above, or can't delete them, post back.