The Hide Drives option is designed to let you hide the drives you choose on the computer, to hide a drive, simply uncheck the box in front of the drive you wish to hide and then press the Apply button. To show the drive again just check the box again. If Windows Explorer is open when you hide/unhide a drive, it is required to press F5 to refresh the list, normally this is done by ItweakU.
The drives with a red circle with a diagonal line over it, marks a undefined drive, meaning there is no such drive on your computer.
If you uncheck an undefined drive, nothing will happen, since that drive does not exist on your computer.
NOTE: When a drive is hidden it's no longer possible to right click the Start button and use the "Open" and "Explore" options, since they are disabled.
The Change Icons section lets you change the most common icons found in Windows. You can change a icon by selecting the one you want to change in the list and then click the "Change" button.
You can then browse to the file where the icon you want displayed is
located. To reset an Icon, just select the one you want to reset and
click the "Default" button.