+ 1 Votes You require a wiping utility like DBan's Boot & Nuke OH Smeg Updated - February 13, 2013 at 6:42am PST http://www.dban .org/download remember to remove the space from between dban and the .org for a working link. After you make a Optical Disc from it you can wipe each and every drive though you should be warned you can only do one HDD at a time and depending on the size of the Drive it may take a long time to wipe the drive. This is the only way to be certain that you have Killed the Infection/s as it writes to every sector of the HDD several times with zero's overwriting anything at all on the drive. After you have finished wiping all of the HDD/s in your system you can use GParted to Format the drives as you require http://gparted.sourceforge .net/download.php remember the space thing here too Or you can use the Windows Install Disc to make the Partitions though with this you may not have the necessary control if you want several complex partitions on a HDD. Col + 1 Votes What OH Smeg said Slayer_ February 13, 2013 at 6:49am PST However, I am not aware of any viruses that can survive a normal disk format in the wild yet. Just that 1 Mac virus that actually infected the battery. + 0 Votes DiskWipe Alec Lerg February 14, 2013 at 5:17am PST I've been using DiskWipe is a free software, it works great. You can also check Tech Republic's Five hard disk cleaning and erasing tools http://www.techrepublic.com/blog/five-apps/five-hard-disk-cleaning-and-erasing-tools/1568 I also advice you to check Tech Republic more often for the great advices that you'll find here.