Mount a VHD or mount an ISO by double clicking in Explorer - a new virtual drive or virtual optical drive will appear. Unmount by right-clicking and selecting eject, or shut down Windows - the mounts are not persistent. If you want them to be persistent, copy a shortcut of the VHD or ISO (not the mounted drive!) to the startup folder:
Work on several computers at once:
Open the Remote Desktop App in Metro, and connect to another PC or laptop on your network. Once your remote desktop is open, grab the top of the screen and drag to the right, so the metro app docks to the right of the screen:
Click on the remote desktop of your choice, and work on that:
or just drag the divider which way you want. If you want to add another remote desktop, just click the empty box on the right with the + in a circle and add the PC name and connect.
Configuration for remote desktop access is in the all control panel items, system screen at the top left, Remote Settings
Its a lot faster than using Virtual machines.
If you prefer, you can have the Apps on the left side of the screen - just drag them across.