I think you will not solve the main problem here. With maxing out the graphic settings you won't affect the CPU, IMO this is the point you want to look for. There must be some 'misinterpretation' of the RTW structure either by Your CPU or by the OS. If you are using Vista/Win7 be sure to run EB/RTW in compatibility-mode for XP (settings can be found in the preferences of the RTW/EB exe). If you are using some sort of Athlon CPU try to set RTW to another mode. The CPU things can ruin a system, so be careful, backup or don't do it.

XSamatan