Uninstall VMware tools from the virtual machine. For more information, see Best Practices for virtual machine backup (programs and data) in VMware Fusion (1013628) and Best practices when backing up a VMware Workstation virtual machine (2006202). Note: VMware recommends to take a backup before upgrading the guest operating system in the virtual machine. To resolve this issue, upgrade the virtual machine: Note: The issue affects all virtualization platforms, including those not from VMware. This issue occurs because, in certain circumstances, the Microsoft validation tool used to assess a system’s readiness for Windows 10 misrepresents the capabilities of the VMware SVGA drivers, preventing the upgrade. Upgrading to Windows 10 using Software Update in Windows 7 and Windows 8/8.1 guests fails To preserve readability I don't quote the article. I just don't have time for it.but I know the nature of this bug is very nasty.The following article: Upgrading to Windows 10 using Software Update in Windows 7 and Windows 8/8.1 virtual machines fail with the error: Unsupported SVGA driver (2126929) at should solve your problem. Sorry, that I do not currently have the bandwidth to aid/assist more in your tracking this down. Our resolution: For now.we have removed VirtualBox from every development system we have. The bug can occur with VMs running, but most of the crashes I experienced, were with NO VMs running. My intution: This instability seems to be related to some type of low level video processing, like potentially GPU raster operations or video buffer movements, possibly your code which is virtualizing the display (if that's possible without VMs running). Multiple streams of audio processing were also involved in 2 crashes. Same symptoms, but needs more stressing of CPUs to exhibit the kernel crash. This instability ALSO exhibits itself on a MacMini (Apple) Mid 2013 with 4 core.also with VMware Fusion 7.1.2. However, the impact can be devastating for those whom try to utilize VirtualBox for some type of production level system. That's because after 10 crashes, and inspecting the OsX System Logs, there are common messages produced in that log, which would give clue to the fact that VirtualBox had any problem, OR that any other OsX driver or subsystem had any problem. Thus you have a very insiduous problem going on within your KEXTs for OsX. It is important to note, that VirtualBox is causing OsX kernel instabilities, even when no virtual machines are running on the system. There have been no more kernel instabilities since the complete VirtualBox removal. The complete system lockups, where 2 of the 3 monitors would immediately go black, leaving desktop still showing on a 3rd monitor, on a 2nd GTX-980, were traced to VirtualBox as the culprit, by using your Un-Installer to remove VirtualBox and it's KEXT(s) from the system. It was after the VirtualBox installation that the kernel instabilities were introduced. I installed VirtualBox 5.0.16 on the OsX-Yosemite 10.10.5 system, (which, BTW, did also have Fusion 7.1.2 installed on it). Unfortunately, I'm in midst of critical timeline of another SW dev project, but thought I would report this problem anyway. It's possible that your developers are already aware of this crash.
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