You get the following error when trying to perform some action with your virtual machine:
Unable to perform the action because the virtual machine is busy.
Another operation on this virtual machine is currently is progress.
- Wait until the previous operation completes and repeat the action.
- Shut down the virtual machine and try again.
- If you still get this error, quit Parallels Desktop and start it again.
If the issue still persists try the solution from the KB112444