Thanks for the reply.
I also googled and found the spyware link, which is why I was worried (but I
don't know who put that site together). I checked out the link you sent but
it still doesn't really explain NTMSDATA nor NTMSDATA.BAK and what the
expected use, existence and modification frequencies should be. For example,
if I never backed up anything, would they still have been accessed/modified?
Is it normal for NTMSDATA.BAK to exist?