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Windows 7: Hard drive space has gone missing

23 Dec 2013   #1

Windows 7 Home Premium 64 Bit
Hard drive space has gone missing

Good day ladies and gentlemen!

As you can probably assess from the thread title, There is a really weird problem afflicting my computers hard drive. The Hard drive with the problem is an advertised 750 GB Western Digital hard drive, with 684 available gigabytes.

The problem I am having is that a mysteriously large amount of hard drive disk space has disappeared from being available, and has left me to have only about 100 Gigabytes left (originally it had whittled down to about 100 MB before I deleted a large amount of miscellaneous files), from my estimated 500 Gigabyte's I had available to me last week, but there is still a lot of hard drive disk space un-accounted for. I've been perusing the windows 7 forum and have tried different solutions to no avail. The methods i've tried are as follows:

-Updating my BIOS, USB, Hard drive and other miscellaneous drivers
-Using Disk Cleanup
-Using Disk Defragmenter
-Using WizTree, WinDirStat, and TreeSize (free) to find out what was eating my HDD Space
-Phisically taking the Hrad drive out and checking out what's wrong with another computer
-Deleting many large files not necessary to function

With the help of WizTree and the other programs, i've noticed that they only can account for one fifth of my hard drive, leaving the rest to the unknown.

I've attached screenshots that may help with diagnosing my problem:

The images should be self explanatory, and I hope they can help in alleviating this issue.
I feel like i've exhausted my options shy of actually taking the rig to a computer specialist. Do you think you guys know what's going on with my hard drive?

Here's my systems specs:
Lenovo Y480
Windows 7 Home Premium 64 Bit
Intel(R) Core(TM) i7-3610QM
8.00 GB
GeForcer GT 640M LE

Thank you so much if you could provide any input!


Attached Thumbnails
Hard drive space has gone missing-disk-management.jpg   Hard drive space has gone missing-disk-space-screenshot.jpg   Hard drive space has gone missing-windirstat-screenshot.jpg   Hard drive space has gone missing-wiztree-screenshot.jpg  
Attached Images
Hard drive space has gone missing-diskpart.jpg 
My System SpecsSystem Spec
23 Dec 2013   #2
Microsoft MVP

Windows 7 Ultimate X64 SP1

Welcome to SF wammeze.

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My System SpecsSystem Spec

 Hard drive space has gone missing

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