Solving Win7/Win8 can't open hibernation problem

Win8 hibernation function is very important, because it has a quick start function. The Win7/Win8 sleep function is enabled by default, but some users with tight disk space have turned off the sleep function.
If you want to re-open, you can open the command prompt window, and then enter “powercfg -h on” . At this time, the problem will come, prompting "sleep failure, the error is as follows: The request is not supported".

This is the case that your disk space is not enough to generate a hibernation file (hiberfil.sys), the size of which is as large as physical memory. Assuming you upgraded the memory, the hiberfil.sys file will grow larger as the memory grows. In the case of insufficient disk, the system will turn off the sleep function by default.
Resolve [hibernation failure, the error is as follows: The request is not supported] The problem:
1. Clean up the temporary files of the disk, see how long your recycle bin has not been cleaned, uninstall the software that is not commonly used, install to other disks symbol.
2. Set the temporary folder, virtual memory, and documents to other drive letters.
3. Slimming your Win8: delete the system's own application backup, delete the msi temporary decompression directory, zero-byte backup directory, delete Download download backup.
4. The ultimate method: divide the capacity of other drive letters to the system disk through the partition assistant software.
Finally: Open the command prompt window, or run as administrator, then enter “powercfg -h on”, which will enable hibernation again.