Shaun o said:
Right your problem is this i suspect, the video driver in windows has become corrupt.
When you first turn on the laptop keep pressing the F8 key to get the extended boot menu of windows.
What you need to do then is load windows in safe mode.
If it boots ok, what you need to do is uninstall the graphics driver in safe mode then re-boot so it loads normaly.
Then you will have to re-install the graphics driver to get all of your screen resolutions.
same thing happens in all of the safe modes - black screen with a moveable cursor