Look for The Virus post on this forum marked "Virus FBI Computer is Locked" this post Has answers with it that give you a link to get antivirus rescue disk for Free.
However use another computer to download and burn the file to CD/DVD or maybe copy to USB
You will need to press "F2" or "F10" to enter the boot menu and change the CD/DVD drive/USB to the first boot device
Note this CD/DVD/USB will run when computer boots up and before windows boots so you could log out and restart the computer.
Note: when Windows is not Running Viruses\Malware cannot run because their never Mini Operating Systems just Programs
When I type any word into google search, all the results come back from .com.au australian websites only. There must be some sort of corrupt file on my system, Its so annoying im not from that country, why is this happening? Please help!