recently, I'm having a problem with my os driver. I just installed Windows 8.1 on this computer and at that time, I got about 40 GB free space on the os disk. However, after a few hours, now I only have about 28 GB free space. I have tried some solutions on the internet but they did not work. Can you please give me some advice

Socercer

There is a good 3rd party app called Treesize (from Jam software) that will tell you what is taking up the space.

Thanks ZigZag3143x

There is a file called hiberfil.sys which is taking up 25 GB. Should I delete it?

Socercer

If you are not using hibernation you can delete it but first you need to turn hibernation off by typing powercfg /HIBERNATE from an elevated command prompt.  Then you should be able to delete it.

Hi socercer,

The Hiberfil.sys file is used to store a copy of the system memory on the hard disk when the hybrid sleep setting is turned on. If this file is not present, the computer cannot hibernate.

Here is a link for reference :
How to disable and re-enable hibernation on a computer that is running Windows (The windows 8.1 takes the same situation)
https://support.microsoft.com/kb/920730?wa=wsignin1.0

If we don`t want to use the hibernate feature ,I agree with ZigZag ,we can disable the feature.

Best regards

• Edited by MeipoXu 9 hours 24 minutes ago