I fought it for months before giving up. It disables all attempts to get help including microsoft, the antivirus update, lava soft, etc.
The only hope was wipe the hard drive and reinstall windows. :(
It is truly bad. I did away with Internet Explorer and use only Firefox now.
Good luck with Firefox. This happened to me about a year ago and it was a pain to get rid of. Several of my collegues were also infected and they used only Firefox. Beware of the hype that one browser is safer than another because they all have vulnerabilities.
Firefox is not immune to this virus