Thanks for your responses. I will learn how to use TES5Edit and see if this helps. My system is decent (ASUS Pro board, MSI GTX 460 Hawk card, 8 gb Ram, 1 gb Vram. However I shut down all ERSO as I thought it might be too much for my system, but it didn't seem to help. I should also mention I have been playing around with my nvidia card settings after reading "Skyrim tweeks" and similar articles. Is there a nvidia setting U might recommend?, or others use with good results?