I have a Toshiba M35-S456 Laptop w/Windows Home OS. I decided to upgrade to Win XP Pro sp2. Everything installed just fine, but the VGA controllers. I went to Toshiba site and downloaded the video drivers (nVidia G-Force FX 200) which is the correct drive for this particular model, but no luck. In my effort to find the VGA drivers, I downloaded several VGA compatible drivers from different sites. After I rebooted the laptop, I received a blue screen with error message: "dumping memory"", I did not want to go through finding the drivers that caused it and removed them, so I decided to reinstall windows again. I boot up from my Win XP CD and started to format the HD with NTFS. While formatting, the process finished 100%, but after reboot I received another message: "Page_fault_in_nonpaged_area x50 setupdd.sys" I used the Recovery console to chkdsk /r, and a different error message came up: "'The volume appears to contain one or more unrecoverable problems”. I cannot access the HD volume to reinstall windows. I used command “fixboot” and “fixmbr”.