Use PowerShell to dismount a disk image Posted on September 1, 2016 by crtechtips How can I use Windows PowerShell to dismount a virtual disk? Use the Dismount-DiskImage cmdlet. It will dismount either an ISO or a virtual hard disk. Specify the path then using -imagepath. Here is an example: Dismount-DiskImage -imagepath “C:\fso\myisodisk.iso”