Although you use TDSkiller or Rkiller you can also damage your computer even more worse than those Virus. If you can run team viewer next time on virus and let one of the people with knowledge for virus to remove it remotely. of course when you close that team viewer they no longer able to use your pc. The Password on Team viewer changes every time you start it. Also When they make black screen on your computer and block mouse, pull Internet Rj45 cable out and they also no longer in your computer. For Wi-Fi Turn it off by the scroll bar sledge on your laptop or pull USB device for wi-fi out.
By the way, try use AVG or KSPKY Cd to remove a Police virus on win xp to win 7
win vista and win 7 can remove the virus in Safe mode most of the time.
Win XP cannot be removed in Safe mode most of the time. There are several way for removing Police virus.