i think your windows vista boot file may be corrupted due to shut down unfortunaturely. I recommended you please restore you computer windows late restore point date.
Laptop in question: HP Pavilion DV2000, running Windows Vista Home (I think 32-bit).
Today, I was using my laptop, running on battery power only. Unfortunately, the battery no longer locks. I moved the laptop and the battery fell out. Naturally, as was not plugged in to an external power source, my laptop shut off.
Upon re-inserting the battery (and plugging in the laptop to an external power source for good measure), I received the "Windows Error Recovery" screen, presenting me with:
Safe Mode with Networking
Safe Mode with Command Prompt
Start Windows Normally
I tried "Start Windows Normally", and after a loading screen (Microsoft Corporation at bottom), then the screen went black. I could see the mouse on screen, yet Vista would not boot up.
I manually shut down my computer and this time selected "Safe Mode": same thing, loading screen, then screen goes black with mouse, Vista does not load.
I then hit "F7" to get to the "Advanced Boot Options":
Repair your computer
Safe mode with networking
Safe mode with command prompt
Enable boot logging
Enable low resolution video (640