After reading the comments section on that site, it sounds like a real bear to get rid of. Here's the last comment that was successful:
Got this horrendous virus yesterday, but have just got rid of it.
Downloaded MalwareBytes on to another PC and put it on to a USB stick. My infected PC would only boot in safe mode - under which MalwareBytes wouldn’t run :-(.
I then restarted the XP machine using ‘Last known good settings’. The virus popped up right away and started to run, but at least now I could install MalwareBytes.
I ran it (quick scan first), and it did find ‘SpyGaurd’ - though SpyGuard itself kept coming on during the scan (I always quickly closed it).
MalwareBytes removed most of it on the first pass, but some elements had to be removed after a reboot - which it seemed to do.
Fingers crossed everything is now clear!