These are the user portions of the registry, you don't want to delete them.
This page has more details:
http://answers.yahoo.com/question/in...0023440AAPuo2f
"Steve T" <> wrote in message
news:FEB03977-CD9C-4AAF-B039-...
> I have 9 files in the root of c:\users\steve. Why so many and what are
> they?
> The file name is followed by, with no spaces, what looks like registry
> info.
> They are different dates. They are in sets of 3 by date. These files are
> in addition to the NTUSER.DAT file, the ntuser.ini file, the
> ntuser.dat.LOG1
> and ntuser.dat.LOG2 files. Can some of these be deleted?