To perform a CHKDSK scan VIA the Command Pompt
1. Click the Start button.
2. Type cmd in the box
3. Right click on CMD to bring up the short cut menu.
4. Select Run as Administrator
A User Account Control window will come up click Yes.
To access the Administrator Command Prompt for Windows 8 and 10
Press the Windows Key + X
Select Command Prompt (Admin)
Once the Command Prompt screen appears.
Type the following command in.
CHKDSK X: /F /R
/F Fixes errors on the Disk.
/R Locates bad sectors and recovers readable information.
Press Y for yes to run after the system restarts.
NOTE: Depending on the sized of the drive this could take a few minutes to hours to complete.
On the systems next boot it will run CHKDSK. After it has completed it will reboot one more time and then load Windows.