Hi, for the past few days my PC has not shut down normally. The screen freezes on the 'Windows is shutting down' page and I have to press down the power button eventually. Also, something ('System') always uses up about 50% of my CPU. I've scanned the PC with many anti-virus and anti-spyware softwares (in safe mode as well) but found nothing. One of them finally caught a 'cybervizion keylogger' but was unable to remove it. I've attached a HijackThis log below. Any help on this matter would be greatly appreciated. Thanks.