I had a virus and had to reformat my hard drive and reinstall windows
98 se. Now there is no sound, except when I start up, I have a woofer
box on, and it opens with a great thud, so I know all my speakers and
the like are connected. (At least I think they are, as I did not take
out any wires from the back to the speakers etc). But now when I look
in hardware under system, I see no mention of soundcards or the like.
When I go to install there are three yellow ?? which come up, but it
does not say whether one of these is sound. Can you help me please?

Computers require drivers to communicate with their devices. You may
need to download a sound driver from the sound card's manufacturer's
website.

Yes I have an atech cdrom with drivers on it like creative etc - but
how do I install them. Dont I have to find the peice of hardware in
system first - like network adaptors and then go in and update driver?
I can see nothing which even refers to sound.