I ran 2 of those rkill programms (antiviruses disabled and unluged internet cable), seemed to work, but combofix still gets stuck.
On monday I'll uninstall avast and immunet and will try again.
P.S. Log from rkill (while the program was running there was messages about some programms that can't be shout down, or requested downtime to be terminated in a unusual way, I don't remember exactly):
This log file is located at C:\rkill.log.
Please post this only if requested to by the person helping you.
Otherwise you can close this log when you wish.
Rkill was run on 010.12.16. at 20:22:51.
Operating System: Microsoft Windows XP
Processes terminated by Rkill or while it was running:
Rkill completed on 010.12.16. at 20:23:08.