PC shutting down

[Wayne2]

Hello people, for the first time ever I am having a problem with Spybot, my computer is shutting down and re-starting as it nears the end of the scan. I have read as much as I can understand in the forums and tried what I thought might work but with no results. I have an Acer PC, with XP and I use firefox.

This is the result I'm getting
http://farm4.static.flickr.com/3354/3545811509_f24704d7fd_o.jpg

I trust one of you good people will understand this and help me out
Many thanks
Wayne

[Wayne2]

I have tried a few more scans and noticed it's getting to virtumonde.sdn then "stalls"? but the counter still keeps working. Out of curiosity I right clicked on virtumonde.sdn and got "Firefox EXE is not responding"

I then thought the problem might have been with Firefox so I uninstalled it and then ran Spybot again = same problem, so I put it back in.

My PC is working fine but because I've relied on Spybot for so long this is really annoying me.

I also have AVG and adaware installed

regards