camner
Contributor
Contributor
‎09-06-2015 05:55 PM

Upgrading a Fusion VM converted from Parallels to Windows 10

I recently imported a Parellels Windows 7 Professional virtual machine to Fusion 8. The conversion went well.

Now I would like to upgrade my Win7 Pro to Windows 10. When I click on the "Get windows 10" icon in the task bar, I get an error message returned that says I cannot install Windows 10 because of the presence of a "Parallels Display Adapter (WDDM)" which is incompatible with Windows 10.

However, when I look in the Device Manager there is no Parallels Display Adapter and I have already uninstalled Parallels Tools (I did that before converting to Fusion).

I'm wondering if there is some vestige of the Parallels Display Adapter somewhere in the registry (or somewhere else). 

How do I delete a device that doesn't show up (yes, I have tried showing hidden devices in Device Manager)?  Is there a workaround for this issue?

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dariusd
VMware Employee
VMware Employee
‎09-06-2015 07:49 PM

Hi camner,

The Windows "Upgrade Appraiser" has its own cache of information describing why an upgrade is allowed or denied.  You might be able to clear out its cache and proceed with the upgrade by following the instructions in this thread: Fix for Windows 10 Upgrade - VMware SVGA 3D issues

(I haven't tried those instructions myself and can't personally vouch for their effectiveness, but we've had a good number of users report success with that method.  Maybe take a snapshot of your VM and give it a try!)

Cheers,

--

Darius

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Woodmeister50
Enthusiast
Enthusiast
‎09-07-2015 02:53 AM

Do the upgrade by downloading the .iso using the download app from here:

https://www.microsoft.com/en-us/software-download/windows10ISO

(Why you need to download an app to yet again download an iso is

beyond me, but it is Microsoft after all.)

Make sure that you select Windows10 (not any of the others).  Also, make sure all

updates have been made to your Windows7 VM.

FWIW, yesterday I upgraded a Win7 Pro VM to Win10 Pro without any issues.  Be sure that

after the installation is complete to shut down Windows, change the VM type to Win10 and

then re-install VMWare Tools.

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