My 500gb C Drive is only allowing 143gb to be used.

Hello, I removed Linux Mint from my laptop and added windows 8.1 after deleting all my partitions. I then Upgraded to windows 10. For the 1st few days it said i had the 500gb for the max however over night it dropped to 143gb. As seen bellow.

((NOTE: This photo is showing only 143gb however it is a 500gb hard drive))


I also took the steps to reinstall & reformat the laptop. Also updated the BIOS and had no luck. I have also tried using WinDirStat to see if it was being hidden somewhere however it seems it just up and vanished. Is there any way I can fix this to get the 500gb back.



SYSTEM INFORMATION
--------------------------
OS Name Microsoft Windows 10 Pro
Version 10.0.10240 Build 10240
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name DESKTOP-GU3ED3V
System Manufacturer ASUSTeK COMPUTER INC.
System Model X551MA
System Type x64-based PC
System SKU ASUS-NotebookSKU
Processor Intel(R) Celeron(R) CPU N2815 @ 1.86GHz, 1863 Mhz, 2 Core(s), 2 Logical Processor(s)
BIOS Version/Date American Megatrends Inc. X551MA.515, 4/15/2015
SMBIOS Version 2.8
Embedded Controller Version 255.255
BIOS Mode UEFI
BaseBoard Manufacturer ASUSTeK COMPUTER INC.
BaseBoard Model Not Available
BaseBoard Name Base Board
Platform Role Mobile
Secure Boot State On
PCR7 Configuration Binding Not Possible
Windows Directory C:\WINDOWS
System Directory C:\WINDOWS\system32
Boot Device \Device\HarddiskVolume3
Locale United States
Hardware Abstraction Layer Version = "10.0.10240.16392"
User Name DESKTOP-GU3ED3V\ThomasM
Time Zone Eastern Standard Time
Installed Physical Memory (RAM) 4.00 GB
Total Physical Memory 3.89 GB
Available Physical Memory 2.63 GB
Total Virtual Memory 5.26 GB
Available Virtual Memory 4.00 GB
Page File Space 1.38 GB
Page File C:\pagefile.sys
Hyper-V - VM Monitor Mode Extensions Yes
Hyper-V - Second Level Address Translation Extensions Yes
Hyper-V - Virtualization Enabled in Firmware Yes
Hyper-V - Data Execution Protection Yes

I only see a shot of a 149 GB drive, where is this 500 GB drive you speak of ?

It`s not in that shot, or even on that computer for that matter.

What's your best reason that it is in fact a 500 GB drive?

Have you ever had more than say 160 GB of stuff on it--operating system, data, applications, everything?

Install Partition Wizard 9.1, run it and give us a shot.

Best Professional Partition Manager | MiniTool Partition Wizard Pro

You say you once had Linux on it, and you said you deleted all the partitions.

Windows may not/does not recognise a Linux partition, but I would think DM would show something, let`s see what Partition Wizard will show.

This should be showing 465 GB if it indeed is a 500 GB hard drive, please post a shot using Partition Wizard.