I have Samsung sf511 with Windows 7 Home preinstalled.
I installed Ubuntu 12.10 last night. First I downloaded ubuntu 12.10 DVD iso and burned a DVD. I rebooted and changed the boot option to DVD and let the Ubuntu DVD run. I selected "Install ubuntu alongside windows 7". In the next step I allocated the diskspace . Ubuntu installed perfectly and it ran OK.
I spent a good time exploring Ubuntu. When I restarted to start my work on Windows again and selected Windows 7 to boot, it showed blue screen after booting up (after logging in). I tried restarting several times but the same blue screen keep showing at the same point of bootup. I also restored windows to an earlier time.
Left with no option I booted from Samsung provided windows recovery option. The recovery process ran fine but when it restarted to boot Windows for the first time all I see is a black screen. Nothing happens. It switches between dark command promt screen to a pitch black screen as if it's rebooting after every 10 seconds or so.
The laptop can be booted from the DVD Drive or USB drive but is not booting from Harddisk.
What should I do in order to use both Windows 7 and Ubuntu?