Okay, just had a little scare. 
After Combofix finished  I wasn't able to do anything on the computer. I couldn't open anything at all, no browser, nothing. An error message kept occuring when I clicked on something saying something like 'illegal operation on a registry key that has been marked for deletion.'
So I rebooted. Great - I could open stuff again but no internet. I rebooted, restarted router, clicked on connection and selected 'diagnose and repair,' all to no avail. 
So I did system restore and, thank goodness, internet is back. Combofix has obviously gone. In fact everything is a bit chaotic now - I don't like to do system restore as I never remember what I need to re-fix, delete etc. Icons are all over the place, settings changed, arghhh!
My system was restored to 31/07/2009 , 8:57.
Maybe we should forget about the Jetico thing? That episode really worried me.  I thought I was gonna have to go outside and make some friends or something 
