igfxext is some system file for an Intel graphics chip.
When something sucks up 100% CPU, in my experience it's typically due to outdated software or drivers so I would say that's very likely. End the process if possible and download and install the proper drivers.
I installed the latest intel chipset drivers but that didnot cure the problem, do you know if the Alienware drivers differ from the intel version, maybe thats where im going wrong, it may need the Alienware drivers? Any thoughts??