I used the Disk Cleanup Tool in Windows Vista, and now the hybrid sleep feature and the hibernation feature are unavailable

To fix this problem automatically, click the
Fix this problemlink. Then, click
Runin the
File Downloaddialog box and follow the steps in this wizard.

NoteIn order to enable the hibernation file, you must have at least as much free space on your system drive as there is physical memory in the computer. If you do not have adequate free space available, you will get the following error when you run this Fix it Solution:

Note this wizard may be in English only; however, the automatic fix also works for other language versions of Windows.

NoteIf you are not on the computer that has the problem, you can save the automatic fix to a flash drive or to a CD so that you can run it on the computer that has the problem.


To determine whether this resolved the problem, go to the "Did this fix the problem?" section.

Problems can occur when the Disk Cleanup Tool disables the hibernation file. The hibernation file must be enabled for the hybrid sleep feature and the hibernation feature to work in Windows Vista. When the hibernation file is disabled and the hybrid sleep feature is enabled, and then you use the hybrid sleep feature, no backup of open programs and open files is saved to the disk. Also, when the hibernation file is disabled, if the computer loses power while it is in sleep mode, open programs and open files will not be recovered after the computer is restarted, and any unsaved work will be lost.

To enable the hibernation feature and the hybrid sleep feature, follow these steps:

1. Click Start, click All Programs, and then click Accessories.
2. Right-click Command Prompt, and then click Run as administrator.
   • If you are prompted for an administrator password or for confirmation, type the password or click Continue.
3. Type powercfg -h on, and then press ENTER.