Ok, I've recently formatted my PC and now my speakers won't work. It doesn't even recognise them.

After doing some searching, I think it's because I need to install a driver for them but the Altec Lansing site could possibly be the most un useful site I've ever seen...
I downloaded a driver from DriverGuide.com but it didn't appear to do anything, so I was wondering if anyone could help me out please? Am I right that I need a driver and if so, can someone point me towards a working one?
Thanks in advance for your help.