Originally posted by Vegas
It's not safe. I'm assuming you're holding the power button down for five seconds, it can basically damage sectors in your hard drive, and then your computer ends up not being able to boot up.
It's happened to me before.
Yea, It'll **** with your .boot files. It's happened to me numerous times too, thankfully Windows 7 has the startup repair. HDDs need to wind down (Pulling the needle off the discs), just like they have to wind up.
Have you tried uninstalling/reinstalling?