can you remember the name of the virus norton reported? is norton up to date? if not update it and run another scan after disabling system restore maybe.
is there a user account listed for this unkonwn user in 'start/control panel/user accounts'? can you delete it?
can you delete the oqfonljo.exe?
try deleting them in safe mode if they cannot be deleted as normal.
try running adaware, spybot, stinger and cwshreader. click here click here click here click here (scroll down) update them all before running and delete anything the find.