I have beat around this for a whole day and have not come up with anything. I have a Toshiba satellite L355-s7812 with a Seagate 320 sata drive. When I woke up Saturday morning and flipped open the screen it was in System Recovery Mode. I let it go all day. came back to it in the evening and it looked like it hung up some time during the day. so I rebooted and all it boots to is a blank screen with the mouse pointer. I have tried safe mode but all it does is hang. Have tried all the system recovery options and all fail. Tried recovery with a W7 dvd and failed. Swapped out with my back up Vista drive and the Vista drive booted just fine. So it is not a hardware issue beyond the HD its self. I put the W7 HD in an external case, plugged it in, Vista sees the drive just fine. Can browse all the folders and so on. I got all my school work so now if it comes down to a reformat it wont matter. Was just wondering that since it seems that the HD is fine if there is a way to recover the corrupt section of 7 and hopefully get it to reboot without having to format it. Would be nice since I have pretty much the way I like how I have it set up.