Norton showing virus that doesn't exist?

Hey guys

I was wondering if you could help me out. My dad's computer has NAV2003 on it, and it's saying he has a virus (wdm.dll) but when I search for the file, it doesn't exist on the system. I tried copying it over from my computer, but when I put the floppy into my dad's system, it says the file doesn't exist on the floppy. I'm really lost.

What happens is when I boot the system, right when it goes into Windows, it pops the virus alert, saying "wdm.dll" is infected from the Windows/system32/ directory, but when I search for the file, it's not there.

Any help would be appreciated. Thanks!!

this might help http://computercops.biz/postp252284.html

Thanks!! The steps didn't go exactly as was outlined in that thing, but the alert doesn't pop up anymore. I'll let you know how things turn out. Thanks!!