Please accept my apologies in advance for what I believe is a really stupid question, yet I'm unable to figure out the answer. I installed Win7 (using a Microsoft Upgrade CD) on top of a Vista Home Premium system. I followed the default instructions of the Microsoft installation disk. It appeared to wipe the disk prior to the install, yet when the install completed, I noticed I still had residual files/folders on my hard drive from the previous operating system. I now only have 1/2 my original hard drive available for use. I'm willing to completely reformat the drive and start over (even created a bootable cd with a wipe feature) however, if I boot from the cd, it starts fine but when I start the wipe process, the system simply shuts down - no power. If I boot the drive using the installed Win7 operating system it runs fine but again, 1/2 my hard drive is used up with redundant files/folders. I'm guessing there isn't a hardware problem, otherwise it wouldn't boot up using the Win7 system. Any suggestions as to how I may format this silly drive? I have a Toshiba P205D laptop that came pre-partitioned with the Toshiba boot.sdi and boot.wim files located within the sources folder on a small partition just for this purpose. Thanks in advance for any assistance offered.