My virus checker runs out this week, so I thought it would be a good time to do a reinstall on my PC. All mt music and photos are stored on a nas. I have the Vista install discs which came with the computer. Th only additional software on the pc is things like i-tune and Photoshop Elements. I also have a back up partition. Can I just format the disc and start from scratch or is there some form of procedure I should follow.