Hi noblesb,
First disconnect any external devices connected to the computer except mouse and keyboard.
I would suggest that you try startup repair using the windows vista installation disk.
- Insert the installation disc.
- Restart your computer.
- Click the Start button, click the arrow next to the Lock button, and then click Restart.
- If prompted, press any key to start Windows from the installation disc.
Note If your computer is not configured to start from a CD or DVD, check the information that came with your computer. You may need to change your computer's BIOS settings. For more information, see BIOS: frequently asked questions.
- Choose your language settings, and then click Next.
- Click Repair your computer.
- Select the operating system you want to repair, and then click Next.
- On the System Recovery Options menu, click on Startup Repair.
Refer the below link for more information.
http://windows.microsoft.com/en-US/windows-vista/How-do-I-fix-a-boot-startup-problem
If the above step fail then check if the computer is able to boot into any advanced boot options.
Steps to boot to Safe mode
1. Restart your computer if it is powered on.
2. Tap the F8 key after your computer initially powers on.
3. Once you see the Advanced Boot Options menu you can stop tapping.
4. Use the up/down arrow keys to highlight your selection.
5. Select Safe Mode and press Enter.
6. You should see drivers loading, and then Please wait.
7. You should then be at the Welcome Screen.
8. Logon to your computer using an account with Administrator privileges.
If you are unable to boot into safe mode then try any other mode from the advance boot options, refer the below link for more information.
Advanced startup options (including safe mode)
http://windows.microsoft.com/en-us/windows-vista/Advanced-startup-options-including-safe-mode
Hope this helps!
Halima S - Microsoft Support.
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