W 32 spybot worm on vista 64 bit
 

Hi all,
I hope I'm at the right place and I wonder if any of you can help me out.
I have an HP Pavilion Notebook with Windows Vista 64 bit Home Premium. Last week my Norton Anti-Virus 2007 started up saying I had the worm. It hasn't fixed the problem and will not complete a full system scan. Norton just seems to 'stall' after some files are checked. In the History section it says the worm has been taken care of but I don't believe that is true.
I am not a new comer to computers but when it comes to starting in Safe mode or doing anything like that (to fix problems) I tend to get lost. Most of the help I've seen online isn't for Vista OS either.
Cany anyone provide a step by step procedure to destroy this virus?
Thank-you