Random crashes running Windows 10 on Ubuntu 15.10

[aanderson]

I am running Windows 10 with 2d and 3d acceleration enabled on Ubuntu 15.10 with an AMD graphics card. At least once a day the guest crashes, typically when I am alt-tabbing screens or using a Microsoft office product. I run the guest at a 4k resolution and right before the guest crashes the screen shrinks down to about 600x480 and becomes unresponsive. About 30 seconds later I see the Windows crash screen "Your PC has run into a problem " and the guest reboots. I am pretty sure the crash is related to a graphics issue since I observed similar behavior before where the guest display driver crashed and the screen shrank down to about 1024x768 until I disabled and enabled the Virtualbox display driver.

[loukingjr]

I would test it with the vCPUs reduced to 2, RAM reduced to 4GB.

You should also update the GAs. You still have the 5.0.12 GAs installed. it's not critical however.