I have 2 hard drives on my PC. Currently XP and all applications are installed on C drive with all my files & Folders on D drive. I have tried installing Windows Vista on C drive assuming that it would automatically format and make a clean install. However it seems to only want to install on a partition on a drive that has enough free disc space. In other words it won't format C drive. I only have 4gb of free disc space so it won't install. I've tried manually formatting C drive but I keep getting error messages and the disc refuses to format. I don't really want to partition C drive as I don't see the point. I am still going to have to re-install all applications to work with Vista and I don't want there being any confusion with XP installed on a different partition. Can anyone offer advice with this? How can I format C drive? Also I assume I'm correct in saying that if Vista installs on C drive, my files and folders on D drive will be unaffected?