Maybe I give up this hunt... Avast found nothing, Superantispyware found nothing etc, don't know know what to do about the memory infection - maybe nothing?
High CPU usage after power up still bothers me, maybe its driver issue but I don't know where to start troubleshooting. I don't know if I have right chipset driver for my motherboard (ASUS M2N), ASUS does not support Windows 7 on this motherboard (
http://support.asus.com/Download.aspx?SLanguage=en&m=M2N&p=1&s=24) so I have drivers from windows update.
Thanks for anyone who has tried to help.