Well seeing as you stopped it pretty quickly in it's tracks, it probably never got to be a full blown infection, so it wont hurt to try that, remember it's when you reboot that it will jump to another file/runkey so try to do as much as possible without rebooting, then when you run another Combofix scan we can see what it says ...
My bedtime now ... don't forget the PM I just sent you, I'll catch up with you again tomorrow
steam