You need to check Norton's Report, Quarantined Items
for the name. If Norton's can't discover the virus it could
be very new.
You can try an online Virus Scanner if you have
high speed. This seems to discover hard to find viruses.
If you can't delete the file because it is locked by the
system you can try moveonboot.
Becareful about removing any system files like iexplorer
or your browser won't work.