How to clean out Hibernation cache

When you turn off your device, Windows stores the programs you're running and your open files in a large file, the hibernation cache. Sleep mode, by contrast, keeps this material in your system RAM and puts the device in a low-power mode. Hibernation mode doesn't draw battery power, but it takes longer to boot up than restoring from sleep mode, which is more or less instant. Unless you're using a mobile device that has trouble with battery life, you can usually disable hibernation, and the storage space that you save is roughly equal to the amount of system RAM.

To do so, click the Start button, type "cmd" (without the quotes), right-click cmd.exe, select Run as Administrator, and click Yes to confirm. This is the Windows command prompt. Paste the "powercfg.exe /hibernate off" (without the quotes) into the command prompt. Ctrl-V doesn't work here, though. Instead, you have to right-click in the window and select Paste. Then hit Enter. If you want to re-enable hibernation mode later, paste "powercfg.exe /hibernate off" without the quotes. The change will take effect immediately.