1) Open an elevated command prompt.Go to the Start Menu and find command prompt, then Right-click on it and select 'Run as administrator'
2) Type in "powercfg -h off" and hit Enter.Type it in without the inverted commas of course. (If you want to enable hibernation just type "powercfg -h on" and hit Enter.)
And that's it! You've saved potentially a few GBs of valuable space on your SSD or hard drive!