The part that I don't understand how to do is in the blue bold..
When you turn your computer on, begin tapping the F8 key. This will cause it to display your boot options, and one of those is safe mode with networking.
Your computer is infested with one of the latest versions of Winantivirus Pro. This malware actually has the audacity to charge people for the privilege of having their computer disabled. How to remove AV Security Suite.