Windows OS partition out of space

Guys, my 100GB C drive is showing it's running out of space, but when I highlight all folders and check the size it shows only 50GB. It is set to show hidden files too.

Where is the rest of the drive space?

 

I'd use Treesize to get a real look at whats on your drive. Have you carried out disk cleanup and all the regular jazz?

Or Is the drive only showing a 50gb total capacity? You may have created an even partition and one half hasn't been recognised?

 

hiberfil.sys!

Thanks for your tip, this program showed that hiberfil.sys took rest of the space.

Can I kill it?

 

Here you go!

http://www.techrepublic.com/blog/tr-dojo/delete-hiberfilsys-by-disabling-windows-hibernate-function/

 

Done!
Thanks for a tip.

Now, I found another one.. windows.edb 30GB file

Reindexing didn't help

 

Have you had a crack at this: https://support.microsoft.com/en-us/kb/2838018, then?

 

Yep, that's exactly what I found and done.
It rebuilt itself to this size.. weird...

 

Odd. Was it a clean install of W8(.1), or have you gone all W10?

 

8.1, 3 years old.

 

That's really weird. Did you try the offline command prompt thingo in that article too?

 

I'll do it all again and see if that changes anything. Whole process again.