I have recently installed windows 7 professional 64 bit on my Toshiba netbook. Before I got each and every one patched up my notebook begin to freeze and usually act doubtful. I will need to restart the system. It will close down after post telling me somewhat regarding overclocking failed press f1 to continue. I thought that this may be happening due to any virus or malware so I scan my system with eset online which discover WIN32/SPY.AGENT.NOS TROJAN. I tried to remove it, it gets quarantined but the moment I reboot and scan my system once more I get these same Trojan. Do you have any suggestion how to get rid of this trouble?