Change the System Drive Letter

To change the system drive letter, follow these directions, where

DriveWrong refers to the current incorrect drive letter. DriveNew referes to

the original drive letter.

1) Use regedit to give Administrators full control in Security > Permissions of:

HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices

2) Rename HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices\DosDevices\DriveNew to an unused letter like DosDevices\Z:

 

3) Right-click \DosDevices\DriveWrong: and rename it to \DosDevices\DriveNew:

 

4) Select the \DosDevices\Z: value name and rename it to \DosDevices\DriveWrong:

 

5) Change the permissions back to Read.

 

6) Check and change the drive letters of the paging files by navigating to:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSetxxx\Control\Session Manager\Memory Management