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I'm running Mac OSX Yosemite v10.10.5 and Oracle Virtual Box v4.3.30 (reported as being the latest version by Check for Updates... in the application) and have a Windows 7 Ultimate running virtually on this machine. I would like to upgrade to Windows 10, however, the upgrade check complains:

This PC can't run Windows 10
It doesn't meet the system requirements.

Here's why Windows 10 can't be installed on this PC.

VirtualBox Graphics Adapter
The display manufacturer hasn't made your display compatible with Windows 10.
Check with the manufacturer for support.

Do I just need an updated version of GuestBox (also v4.3.30) additions? Do I need to wait for Oracle to fix their graphics driver, or is there a workaround to run Windows 10 upgrade today?

Update: I upgraded to VirtualBox v5.0.4 and installed the corresponding Guest Additions on the Windows machine, as well as the extensions suggested by Ramhound, although I'm not certain that was needed, are those for a Mac VM or for the host? After reboot, of the VM, I get the same error that Windows 10 cannot be installed due to the graphics driver being unsupported. Do I need to force the Windows machine to recheck the drivers somehow?

Update: Using the the Windows Media Creation Tool gave the error:

You can't install Windows 10 because your processor doesn't support NX.

I also had to increase the partition size to allow the install to attempt by first renaming it to drop the character — from the vid filename to avoid errors resizing and then resized using the command:

VBoxManage modifyhd "/Users/xxx/VBox VMs/Windows/Windows 7.vdi" --resize 32000
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    The version of Vbox you are running does not support Windows 10, so upgrade it, to a version that does support it. Here and your extensions are also out of date.
    – Ramhound
    Commented Sep 19, 2015 at 2:00
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    @Ramhound Strange that v4.3.30 on check for updates says "You are already running the latest version of VirtualBox". Thanks for the tip!
    – WilliamKF
    Commented Sep 19, 2015 at 15:35

1 Answer 1

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Don't be fooled by VirtualBox telling you that you have the latest version when using the Check for Updates... menu item, as that only reports minor updates. There is a v5 line out that fixes the issue of installing Windows 10. You can see the latest major version here.

Download the latest VirtualBox and GuestBox Additions here.

Then updated the settings for VirtualBox to Windows 10 (32-bit) version and updated the system processor by checking Extended Features: Enable PAE/NX.

Finally proceed as explained in this answer and download the Windows Media Creation Tool to force the update.

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