Norton XP Pro Help

[snager]

I believe there's a virus on my sisterinlaws PC So I reformated loaded win98 then XP Pro Corp. and it was slow as heck. Well anyways then I loaded Norton Systems works 2003 and when it restarted for the systems files I got a error ....
Settings Alert:
Some Symantec product settings have been changed by an unauthorized program. This can indicate that an attacker or a virus is Attempting to disable your protection.

So then I removed it ... tried to go online to scan from the web site and It wont pick up my modem. I've gotten some other errors when I did a system check up.
Error: IE Migration: No rating migration.
Private.INF ...does not exist.
Error: DCOM got error " % 1053 " Attemting to start the service ccpwdsvc with arguments:
Error: Windoc.exe is damaged
Error: loading mmhid.dll The specified module could not be found

Then I have some weird Dll files.
Video codecs.
c:\windows\system32\tr2032.dll (The Duck Corporation)
\clividdd.dll ( Iterated systems, INC)
\ivvideo.dll (vivo software)

Sure could use some help I know it's a virus just dont know what one and how to get it off it wont let me load Norton must know it'll kick it's butt
Snager

[glc]

Try using the hard drive manufacturer's utility to "zero" the hard drive, then load XP, allowing it to partition and format the drive, without installing 98 first.