Multi Monitor no longer working

O

OwenA1

Bit poster
I'm running Parallels 9 (9.0.24251) on Mac OS X Yosemite (10.10.3), I am using my Macbook Pro (Late 2013 model).

At my previous client I used the Macbook closed with 2 monitors, I've moved to a new client and I'm now using the internal monitor and an external monitor and every single VM the multi-monitor support simply no longer works, windows only sees 1 monitor, I've tried reinstalling the tools, even completely installed a VM from scratch and I can not get windows to see more than one monitor.

Since the only suggestion of reinstall parallels tools doesn't work does anyone have any other suggestions?
 
Hi OwenA1, please navigate to Apple icon > System preferences > Displays > Disable mirroring options and check if the issue still persisting,
If the issue still persisting:
1. Start virtual machine, go to Start > in the search box type devmgmt.msc and hit Enter (return)
2. Expand Display adapters and make sure that the is no exclamation mark and the adapter is called Parallels Display Adapter.
3. If these requirements are not met:
4. right-click the adapter > Uninstall. If the pop-up appears, check Delete the driver software for this device and click OK.
5. Restart virtual machine and reinstall Parallels Tools (in Parallels Desktop top menu bar go to Virtual Machine > Reinstall Parallels Tools).
6. If these requirements are met:
7. In Parallels Desktop menu bar go to View and check Use All Displays in Full Screen option.
8. Switch the virtual machine into Full screen view mode.
9. Go to Start > in the search box type Control Panel and hit Enter (return).
10. Go to Hardware and Sound > Display > Adjust Resolution (on the left pane).
11. Click the additional monitors one-by-one, and in the drop-down Multiple displays menu select Extend these displays for each of the monitors.
12. Restart the virtual machine and check if the issue still persisting.
 
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