turned my computer on and something Security took over. Scanned my computer and said there were 47 problems. They want me to register for their software I think. they have taken over I run xp pro. have avg control they say it is effected, also taskmaster exe. and all i have is a lite blue sceen tying to go on line which does not ever happen. says explorer exe. is infected. What can i do for this . Hope someone can help me