Well, the tweaks in the red group should not be used if there is no specific reason For example, I disable UAC because after installation I have to set up a lot stuff and don't want every time an UAC prompt. But after all done I set UAC to maximum level. Or I disable Hibernate cause I have too much RAM and my old TV-card don't survive a wakeup form hibernate state. DisablePagefile should generally not be disable, but I often need to install Windows in a VM with very limited space and i sure there is no need for a pagefile. With my PC that have 16GB RAM I actually could disable it, but i don't. I set it to a small minimum size. Often people say, that some program needs a pagefile to work, but if you ask them which program they instantly get some Alzheimer attack Well I never found such a program, but a small configured pagefile don't hurt