download both adaware and spybot search and destroy. click here and click here
after downloading install and update them both.
next click start/run type "msconfig"(without the ") click ok
click the "start up" tab and then untick everything listed except for your av an firewall,restart in safe mode
tap F8 while windows starts and select safe mode.
once windows starts,then run both adaware and spybot one after the other and remove all they find using the default settings.
also try click here (never used it myself) i do use spybot and adaware though.both good.