The reformatting of the hard drive may not remove all elements of a virus, depends on the type. It may be able to hide in any case.
The best way to get rid of viruses on computers is to keep updated software which will scan all the time for viruses. If this is a Windows computer, going to safe mode and running the anti virus software will get rid of viruses. Another thing to remember is that the virus can get on to the computer hard drive again if you have any disks, cdroms or DVDs which were made when the virus was on it. Almost all viruses will copy itself to any media during infection. It is very important to have up to date software, whether or not you have to pay for it, and many are free.
Not a good idea to put your email on a site like this (any site for that matter).
I am not sure what you mother board is, but if it is "ALiveNF7G-HD720P M/board
" with a Nvidia 7050 sound card.
Information you need when you go to the website:
The OS you are installing.
The Motherboard name and model number.
The exact name of the sound card and model number.
Here is a link, since you have not mentioned what your OS is, you can download what you need or email them, you may even be able to call.http://www.nvidia.com/Download/
Hope it all works out for you.