Strange you couldn't find it in the Registry.I found several
references of it under Current Control Set.
They referred to my USB drives.
In addition I found even more of them in C:\WINDOWS - All of them
diiferent versions and all related to updates.
But I agree, it is strange that it would appear on your data drive D:\
However, since you have it , it also means that the update, whatever
it was, has been installed.
Have you tried Unlocker ? http://ccollomb.free.fr/unlocker/ or the
regsvr32 /u updspapi.dll yet?
Either one should do it. Most likely after a reboot or possibly while
in Safe Mode.
I don't foresee any trouble arising from the deletion, but you may
want to copy this file before you delete it
and save it to another place, just in case.
I have had other cases where M$ dumped files outside my C:\
drive .Very annoying.
It seems that this may happen if a threshold is reached where "
Windows decides" it should go on another available drive.