critical shut down when playing rohan

[jiryBB]

Hi,
Does anybody experiencing similar problem with rohan ?
After last maintenance my pc shuts down when I play rohan, usualy in couple mins to 1 hour, (temperature of CPU is ok and it isnt overloaded)
It happens only when rohan is loaded.
I tried to reinstall rohan, nothing helps. After couple other tries i discovered that I need to uninstall antivirus. (I remember that time ago was problem with Avast+Gameguard+HP PC configuration)
But unfortunatelly this time I uninstall Avast and tried Avira with the same result - PC shuts down in couple mins when log in to rohan.
I can play with no antivirus only .. Id say it shouldnt be like that.