BitLocker Setup Could Not Find Target System Drive

When trying to setup BitLocker, you may get the following error on Windows 8.x and Windows 10:

BitLocker Setup could not find target system drive. You may need to manually prepare your drive for BitLocker.


There is not enough space to encrypt your hard drive. The active partition must be reduced, it should contain a minimum of 10 percent of free space. So, insufficient free disk space prevent BitLocker to operate.


That’s pretty easy, you just need to free up some space on your hard drive. So you must shrink your partition and re-run the setup again.

To shrink the drive, Right click “This PC:

  • Manage
  • Disk Management
  • Right click your drive and Shrink Volume...

You can also use the following command:

This command will shrink the C:\ drive and create a system partition of XXXMB


Additional Information


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About Nicolas 248 Articles
I work as a System Engineer, based in Switzerland with a primary focus on Microsoft technologies. I have 8 years experience in administering Windows Servers. . I am a Microsoft MVP for Cloud & Datacenter Management. I also received the PowerShell Hero 2016 award by PowerShell.0rg. And finally, I am "MCSE: Cloud Platform and Infrastructure", "MCSA: Windows Servers", "Administering & Deploying SCCM", and CheckPoint CCSA certified.