Your computer have PUP (Unknow program form attacker).
You must check spyware now.
all antivirus do not detect it.
Please explain more. I am experiencing the same problem right now. Did you find out what kind of attack it is. Can you please give the name of this unseen program, so that I can try to remove it. I have run avast, avg, karpesky online scanner, bitdefender and they were unable to detect it. I have also run Trend Micro Sysclean, SUPERAntispy, Spybot, Ad-aware, Windows Defender, Rootkitrevealer, Blacklight F-secure rootkit scanner and BitDefender rootkit scanner beta. Have run all these programs in Safe Mode with reboots in between each. They have not been able to find anything. Thanks