I had purchased a new laptop for my son. It has Windows Vista installed in it. It is working nicely for few months in start. Now due to some issue I face error on the screen. So preferred to launch Startup Repair. But as I choose this option I can only see a blank screen. Nothing appear after that. When I try to go back on the regular boot, Windows freeze on login screen. I tried to enter safe mode but still I can see the recovery screen only. I do not have Windows installation disc with me. What I can do know to fix this thing.