Hi I'm new here and I desperately need some help, Last night I Updated my nVidia graphics driver and that all went well. I was just watching youtube videos and plaing an online game (League of Legends) when I thought that It's time for me to get some sleep but I accidently left my laptop on. I have a Dell Laptop XPS 17 L702X with: 8gb DDR-3 Ram, 2nd Gen Intel i7-2670QM 2.20 GHz processor, 3G nVidia GeForce GT555M GPU, 2 750GB 7200RPM hard drives 2 operating systems [(Ubuntu and Windows 7), Windows 7 Ultimate x64 SP1] Anyway when I woke up my Laptop was off so I just thought that the battery had ran out but I then realised that it was plugged in. When I turned it on everything seemed normal e.g. GRUB boot loader started and I selected windows 7. Then Before the windows 7 boot logo appeared my computer restarted. I thought this was just a once off bug so I tried again and I got the same result. I tried Ubuntu and that loaded up fine (That is what I'm using now to post this). I turned my computer off again and tried loading windows 7 in safemode, However when I press F8 for options on how to boot windows 7 my computer just restarted before the options came up, So I cant load windows 7 normally or in safemode. This goes on with the things that I tried to fix this. I borrowed my friends Windows 7 CD to boot from to repair my computer. When I do that and get to the window that says to select an operating system nothing appears. So I just ignored this and went to start up repair, This went on and on for hours and It wouldn't finish so I just restarted my computer and tried something different. I couldnt do a system restore because I couldn't select an OS form the list. I ran a windows memory diagnostic scan and that finished with no results. I searched on the internet for fixes and I came accross System file checker via CMD, I tried the steps on that but still had no luck (sfc /scanfile=c:\windows\system32\zipfldr.dll /offbootdir=c:\ /offwindir=c:\windows) (sfc /scannow /offbootdir=c:\ /offwindir=c:\windows) So Im stumped on what to do, I have tried the start up repair, Memory Diagnostic and System file checker and they didn't fix the issue. I don't have a Dell recovery Partition because I Re partitioned my hard drives for dual booting and setting them up to my liking. The last thing I did before I left my Laptop (hardware related) was install new video drivers which I can't think of why that would cause this since I have done all of that before. Also I thought maybe my hard drive that had Windows 7 installed on it just wasn't showing up but when I use Ubuntu I can see my Windows 7 Hard drive there and I can move files to and from it, So it is being detected from Ubuntu. Please help I really can't think of anything else to do and I really don't want to do a clean install because I have a heap of things on there that I don't want to loose including school work. Lastly when I installed the video drivers my computer required a restart which is normal and when I restarted in it was fine and after that all I did was play games and watch videos perfectly fine.