Hello everyone! Welcome to my first feature article this month. For those of you who are using Windows Vista, you may have encountered this “mystery” wherein you were able to hibernate (or at least see this option) your computer, but then for some reason your computer “forgets” this feature. How did it happen?

One possible culprit of this is the Disk Cleanup utility.

Cleaning up your hibernation file disables the hibernation feature of your computer.  Here’s what you can do:

  1. Run the Command Prompt as an Administrator.
  2. At the command prompt, type powercfg /hibernate on.

The hibernate option usually becomes available after the command is completed.

You can also use the PowerCfg command-line tool to determine whether the computer supports the hibernation feature. At the command prompt, type powercfg /a.

Prevent this problem from recurring
Make sure to clear the checkbox for the Hibernation File Cleaner when performing disk cleanup.

MSKB Article 929658