Hi Sammy,
Do this to leave Windows Updates on (after you gain access) and to stop Driver Updates from loading.
How To Disable Automatic Driver Installation In Windows Vista - Drivers
http://www.addictivetips.com/windows-tips/how-to-disable-automatic-driver-installation-in-windows-vista/
http://technet.microsoft.com/en-us/library/cc730606(WS.10).aspx
You can use the solutions in this KB - 3 methods and I listed a little help for them below
The update is not installed successfully, you receive a message, and the computer restarts when you try to
install an update in Windows Vista
http://support.microsoft.com/kb/949358
Method 1: Start Windows Vista with the Windows installation media, and then use the Repair feature
How to Do a Startup Repair in Vista
http://www.vistax64.com/tutorials/91467-startup-repair.html
You can also do a Startup Repair from Safe Mode accessing the Recovery Options if you have them available
or use the DVD as above.
This tells you how to access the System Recovery Options
http://windowshelp.microsoft.com/Windows/en-US/Help/326b756b-1601-435e-99d0-1585439470351033.mspx
Try StartUp Repair from Recovery Options
How to do a Startup Repair
http://www.vistax64.com/tutorials/91467-startup-repair.html
Method 2: Start the system in safe mode, and then use the System Restore feature
How to Do a System Restore in Vista
http://www.vistax64.com/tutorials/76905-system-restore-how.html
You can also do a System Restore by booting up with a Vista disk.
Method 3: Rename the Pending.xml file, and then edit the registry (This method is part of the advanced troubleshooting.)
See the KB article below for this.
You can use this method on updates that have this issue.
http://support.microsoft.com/kb/949358
Hide the Update (Right Click - HIDE in Windows Updates) and go to the Microsoft download center to download
and install it.
Microsoft Download Center
http://www.microsoft.com/DOWNLOADS/en/default.aspx
Once you are in Windows again I would run the Reset here as a precaution.
How do I reset Windows Update components?
http://support.microsoft.com/kb/971058
Hope this helps sort it out for you.
Rob - Bicycle - Mark Twain said it right.