Creating a barebones class upper filter driver on the System Class,
that does absolutely nothing except return status success in the
AddDevice routine (does not attach to the device stack), causes
PARTMGR.sys to have a yellow bang in device manager and have the
device status say "This device is not present, is not working
properly, or does not have all its drivers installed. (Code 24)".

The filter driver is not listed as a class upper filter or anything
(as well it shouldn't as partmgr does not belong to the System Class).

Anyone have any idea what is going on? I posted last week, but for
some reason my posting was deleted...hmmm....

I don't see partmgr on Vista so this seems to be a XP driver bug.

Gabe