How to delete Windows 7 virtual drive

If using the command SUBST X: /D does not work then try rem or delete the occurrence of the SUBST command in the autoexec.bat file & reboot.

If using Windows 7, try to open your prompt window as Administrator and then run the SUBST X: /D normally

After doing a Google search (taking less than a minute) I found this:

SUBST X: /D

where X is the SUBST drive