Your motherboard is a Asus P2B,
Firstly click here---> Asus.com

To the right of the screen,you should see the following options:

SELECT PRODUCT/SELECT SERIES/SELECT MODELS:


Click SELECT PRODUCT choose MOTHERBOARD "9th from top"

Click SELECT SERIES choose SLOT 1 "3rd from top"

Lastly click SELECT MODELS choose P2B "5th from top"

You'll now be redirected to the drivers,utilitys and bios revisions for your motherboard.

WAIT!,

There are no drivers listed for your motherboard,just a couple of utilitys+bios revisions?
Oh well,You should be OK reinstalling WIN98 without a worry [i said should be OK ]
GL
When you've finished installing windows,it won't harm to download/install the relevent updates for your comp[help prevent further attacks]

Go here---> Windows 98 updates

D'oh im so tired,just realised,Why can't you delete the virus? what AV software detected it?

Try runing Trendmicro free online scanner or BitDefenders online scanner alternatively you can download/install AVG Free Anti Virus
(might save you alot of hassle)