Vista Problems

Hey everyone
I am having problems with my Dell Studio 1735. Whenever I start my computer normally it will load until the windows vista splash screen and wont move any farther. The green orb will keep moving but it doesn't do anything else. I have tried the repair function. Tried starting it in safe mode. I have also inserted the windows vista disc and install it again and that didn't work. I have also taking another hard drive out of another laptop and did everything above and still no results. Any advice or tip would be great. not sure if i need a hardware change or if it could just be a software issue. I am trying to get my hands on a different windows disc.
Thanks
Tyson

Welcome
If your stuff is backed up try press f11 quickly and many times during boot
if it does not work
try with cntrl11

If it works you will lose your stuff and everything will be back like the day that you bought the computer.

You can try to back up your stuff first.
Use Ubuntu Live CD to Backup Files from Your Dead Windows Computer - How-To Geek

If you cannot load Ubuntu, proabably a hardware problem