vista "configuring updates step 3 of 3" continous loop solution

I stepped into this mess today and finally got out of it. what i did-

1. when you see the “Microsoft (C)” with the moving lines, hold the power button until it shuts down.

2. then start it again, you will find a window asking for "launch automatic repair". choose this option.

3. i didn't have to do anything else. if you are still stuck, follow these instructions.