How to Reduce/Remove HiberFile Size on Windows 10

As some Windows users may know, hiberfil.sys is used by the system to record what applications are open before entering hibernation state- for resuming your previous session with all open windows and documents exactly as they were.

So if you do not use sleep or hibernate modes much, then having this file on your system drive can be useless because it’s mostly using space unnecessarily.

Luckily there are a few simple steps you can take to reduce the size of HiberFile so that Windows 10 boots faster!  

HyberFile Function

Hibernation allows you to save the current state of your computer to a file on your hard disk.

This is faster than shutting down and then starting up again later.

This file is called a HiberFile. It saves memory in case you do not have time to shut down your machine, or if you have to restart it for some reason.

In this state, all documents and open apps are saved so that when you resume hibernation, everything appears the same as when you left off.

The computer does not power anything on when going into hibernate mode. Rather it copies the content of RAM onto the disk and then powers itself down.

You can also refer to our guide fix windows 10 boot/startup errors if you have them.

That was a brief intro, now lets talk about our main topic;

Reduce hiberfil.sys File Size In Windows 10

If you have a modern computer that came with Windows 10, then it can take advantage of the new “fast startup” feature which includes Hybrid Boot technology.

This feature keeps track of all open programs and start-up services when your computer goes into sleep mode so that boot up is incredibly fast (<2 minutes).

This keeps your computer ready to go whenever you need it but does take away the ability to put your machine in hibernation mode.

To still get this same benefit you would need to manually turn off hibernation while keeping fast startup enabled. 

Doing this will allow you to reduce the size of HiberFile on Windows 10 by half!

Follow these steps, to reduce it’s size to almost half;

1. Make sure fast startup is enabled on Windows 10

2. Type “power options” into the search bar (bottom left) and open that option up under the control panel.

3. Under this window, click “change what the power buttons do.”

4. The following window should appear; select change settings that are currently unavailable and then click on hibernate while keeping fast startup enabled.  Click save changes when prompted to prevent any data loss.

5. Right-click the start menu, select run and type in:

powercfg –h –size %60 
powercfg /h /type reduced

after that hit enter once done so to turn off hibernation mode(Some users may need to restart before this takes effect

6. Now the size of the hiberfil.sys file has been reduced to 50% of its original size!

Remove HiberFile in Windows 10

If you are in need of more space on your computer, want to continue hibernating your machine, or no longer wish to use fast startup then follow these steps to remove HiberFile altogether.

1. Once again open up power options by searching for it in the search bar (bottom left) and under this window click “Change what the power buttons do”

2. Next hit change settings that are currently unavailable. Under this menu click to delete the hiberfil file while keeping fast startup enabled;

don’t forget to click save changes when prompted!  

Now hibernation is disabled but with a smaller sized HiberFile than before; enjoy!

Frequently Asked Questions (FAQs)

Q1. Is it possible to hibernate my Windows 10 machine with a fast startup?

A1. No, this method relates to reducing the size of hiberfil.sys so that you can still take advantage of a fast startup while having a smaller hiberfile.sys file on Windows 10.

This will improve boot times but not allow the use of hibernation mode.

Q2. Why is it better to have a reduced hiberfil file?

A2. If you have a modern computer that came with Windows 10, then it can take advantage of the new “fast startup” feature which includes Hybrid Boot technology.

This feature keeps track of all open programs and startup services when your computer goes into sleep mode so that boot up is incredibly fast (<2 minutes).

This keeps your computer ready to go whenever you need it, but does take away the ability to put your machine in hibernation mode.

To still get this same benefit you would need to manually turn off hibernation while keeping fast startup enabled. Doing this will allow you to reduce the size of HiberFile on Windows 10 by half!

Q3. How do I restore my hiberfile if I want more space on Windows 10?

A3. You can always revert back to where you were before doing these steps, by following the tutorial again with “No Changes” selected when prompted at each step given above.

Q4. Can I reduce hiberfil on Windows 8 or 7?

A4. No, the only way to still get this same benefit is to manually turn off hibernation while keeping fast startup enabled.

Conclusion

This is a great new feature that Windows 10 has brought and I’m happy to see it get more use than it did previously.

It gives us the option of getting better startup times and still being able to take advantage of hibernation mode which used to be one of the most battery draining features on previous versions of Windows.

Hope this article was helpful, if so like us on Facebook for more tech content!

Leave a Comment