I have a 4 year old Windows 7 laptop which has suddenly started playing up. Last night, I received a runtime error, which when I clicked OK shut down Explorer and removed the start bar from my screen. I was unable to get it back or to make my laptop restart via ctrl+alt+delete. When I forced a restart by removing the battery, I ended up with a black screen with a movable mouse cursor. The same happened when I tried to boot into safe mode, but with the standard 'Safe Mode' text in each screen corner, and Microsoft ® Windows ® (Build 7601: Service Pack 1) at the top edge of the screen.
Can anyone provide any help to revive my ailing laptop?