Display High Color Icons (All Versions) Popular
If you like a bit more color and detail in your icons, then this setting allows you to enable hi-color mode. Show your Windows icons in all their high resolution glory.

Fix AMD Athlon AGP Paging Issue (Windows 2000) Popular
Windows 2000 based computers may stop responding when you use an Accelerated Graphics Port (AGP) program with an AMD Athlon processor. This is due to the memory allocated by the video adapter driver becoming corrupted. This registry tweak will fix the problem.

Control the Windows Animation Function (All Versions) Popular
Although the animation function can make animated Windows look good, it can also slow down your PC if you have a slower graphics card. This setting allows you to control whether the function is enabled or disabled.

Enable Font Smoothing (All Versions) Popular
This setting controls whether fonts are anti-aliased to appear smoother when displayed within Windows.