Would you please tell us the full name of the virus?
Because I found out many possible rogues: xp antivirus 2o12, XP antispyware 2012, xp security 2012, xp home security 2012...
and here is one of site that I recommended (there is video about such fake security software)
http://www.onlinepcsavior.com/xp-antispyware-2012-malware-removal-instruction-for-xp-antispyware-2012/