What if Win10 10049 cannot start the Hyper-V virtual machine?

After installing the Win10 preview version 10049, it was quickly discovered that the virtual machine Hyper-V that comes with Win10 could not be started. After collecting the feedback from the users, it was not easy to find out the problem, but I also found a corresponding solution.

First, if you have not started the Hyper-V virtual machine in the Win10 10041 preview, and then upgraded to the Win10 10049 preview through Windows Update, then you will open the Hyper-V virtual machine and it will appear. Unable to run the problem.
If you downloaded the Win10 10049 ISO image and installed it completely, then it is not important whether you started the Hyper-V virtual machine in the Win10 10041 preview. In this case, you cannot run the Hyper-V virtual machine. of.
Which of the above circumstances will not be able to run the Hyper-V virtual machine, then we have a temporary solution.
Workaround:
You only need to open the Hyper-V virtual machine in Win10 10041 preview (how to open Hyper-V virtual machine manager), and then upgrade to Win10 10049 preview through Windows update, you can The Hyper-V virtual machine is running normally.
Of course, to solve this problem, you need to wait for Microsoft to push the fix, or completely solve the Virtual Machines adaptation problem in the next Win10 preview.
If you haven't used Win10 10049 yet, you can disable Win10 to automatically update the preview version to avoid the Hyper-V virtual machine failing to start.