Microsoft security software detects and removes this threat.
This threat claims to scan your PC for malware and then shows you fake warnings. They try to convince you to pay to register the software to remove the non-existent threats.
There is more information about this family of threats in the Win32/FakeCog description.
The following free Microsoft software detects and removes this threat:
Even if we've already detected and removed this particular threat, running a full scan might find other malware that is hiding on your PC.
You can also visit the Microsoft virus and malware community for more help.