I have 3 mounted network drives mounted to the i:, y:, and z: drives on my Windows 7 machine. I am able to unmount drives i: and z: just fine by either right clicking and choosing "Disconnect", or by executing
net use z: /delete in the command prompt. However, my y: drive will simply not disappear from explorer. the drive it is mounted to no longer exists, so I have no use for it anymore, but when I execute
net use y: /delete, the drive simply gets a red 'X' over it indicating that the netwotrk drive cannot be found, rather than removing itself from My Computer.
If anyone has experienced similar issues, please let me know how to solve the problem.