Will reformat cure these viruses?

Okay, I am running Win98SE on a ASUS P4S333 (SIS645) with IBM 60Gb HD and 512 mem Corsair and P4 1.5Ghz. Norton Anti-Virus tells me (after I finally did Update definitions) that I have funlove.int virus in alevir.exe and Opaserv.E.Worm in Brazil.pif. It has been quarrentining them at startup and I have been using it this way.
I recently bought the ATI 9700 PRO graphics card and when I tried to install it, I get the error voice telling me "Computer fail CPU test". I since found out that Win98SE doesn't work sometimes with ATI 9700 PRO (do ya think they could TELL US THAT BEFORE WE BUY!) as MS is no longer certifying devices to work with any OS earlier than ME.
So, my question is: If I reformat and install WinXP (which I now have), will the viruses be removed? Or will I have to do some kind of deep reformat or run a powerful magnet over the drive? Any remarks can be considered helpful if they pretain to my problem. Thanks.

Take-Out HE heh I yam an euthanesiaist.
"We killed OUR Hitler" - attributed to Paul McCartney (If so, then well done, sir)<P ID="edit"><FONT SIZE=-1><EM>Edited by Take_Out on 01/05/03 05:13 PM.</EM></FONT></P>

A reformat will take care of any viruses providing you actually reformat and not just reinstall the OS.

-- Ah sh*t! sys64738 --

Thanks, MAV, I do plan on reformatting with FDISK.
Take-Out

"We killed OUR Hitler" - attributed to Paul McCartney (If so, then well done, sir)

fdisk reformats the disk.

-- Ah sh*t! sys64738 --