Computer freezes while zoning
 

Once every 10+ zoning's while playing p99 my computer freezes up. No idea what's causing this, as I play other games (more graphically demanding etc Skyrim, BF4, Far Cry 3 etc) and have never had this issue. I can't even Alt + Ctrl + Dlt out of it or anything. I have to restart my computer. Any ideas?:confused:

computer specs