Hi,
I didn’t experience this error but I can tell that your computer might be infected by some malicious viruses but your antivirus fails to detect it. Sometime due to our mistake we install keylogger and later on repent over it. But you need not to worry with few security tips and a powerful Anti-Spyware Software is enough to protect your computer.

Fro more information you can visit:

http://www.removepcthreats.com/