Missing hard disk space

[scorchdelta62]

As shown in the pictures below, I am missing a few (about 30) GBs from my hard drive.

I have tried deleting previous System Restore points, changing the pagefile.sys size, disabling hibernation. Even vssadmin list shadowstorage shows a 0% usage.

I have tried my luck with SpaceSniffer, but I can't pinpoint the source of the problem

Any more ideas on what possibly is using so much of my hard drive?

edit: Correctly uploaded the images

 

[Lutfij]

Seems like you're tried everything. You could back up your critical content and reinstall your OS(after recreating the bootable USB installer using Windows Media Creation Tools) or you can see if your BIOS is pending any updates.

 

[scorchdelta62]

Seems like you're tried everything. You could back up your critical content and reinstall your OS(after recreating the bootable USB installer using Windows Media Creation Tools) or you can see if your BIOS is pending any updates.

Thanks for the recommendation Lutfij! Unfortunately BIOS didn't have any update. I will resort to a clean install, I just want to avoid it for now cause I am in the middle of important work, so I am just checking if anyone else has more ideas than me from past experiences