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Reclaim disk space, disable hibernation (hiberfil.sys)

If you just found a gigantic c:\hiberfil.sys, it's your hibernation save file. If you don't use hibernation, turn it off and reclaim the space. On my new rig, I have a sweet 32GB of RAM, and my hibernation file at this point was 26GB. That's a lot of wasted space on an SSD drive when I don't use hibernation.


To disable hibernation and remove this file in Windows Vista, Windows 7 and Windows 8, open a command prompt as administrator and type:

powercfg -h off


This should turn of hibernation and delete the big file automatically :)

For Windows XP, just go to Control Panel > Power Options > Hibernate tab.
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