I'm surprised you had to use the driver disc at all on a new PC, it should have been fully working when you set it up. Anyway, there are two ways to proceed:
1. If your new PC sports a big brand name such as Packard Bell, Dell etc., you should visit their website as those companies carry all the drivers -- you just need to know the model number of your PC.
2. If it's built by a smaller company they are less likely to carry drivers on their website (some of them don't even have a website) so then you need to use the motherboard make/model to identify what drivers you need. The maker of the motherboard has the drivers for it.
Download and run Belarc Advisor from here: http://www.belarc.co...e_download.html
Post it's info to the forum as a new topic as it's more likely to get a response that way.