Im planning to reformat my laptop coz its infected with lots of viruses and I cant use a lot of applications, and got a bluescreen background... and I cant change my background because everytime I change it nothing happens... there was this AntiMalware2009 which I havent installed and scanned about 248 infections in my laptop and wants me to buy the software so that it will fix everything...I had a working antivir but did not solve eveything when I scanned it...

I want to to know how to backup important drivers for my Laptop before I reformat...and
how to reinstall these drivers...

Im using windows vista ultimate, and an Acer Laptop but cant use e-recovery...