Hi team!
Here's a case that A Blue Screen of Death (5C) Happens to a Windows VM.
Symptom
There is a possibility that a blue screen of death happens to a running Windows VM upon a power failure or when the VM is forcibly stopped, as shown in the following figure.

Possible Causes
When a power failure occurs or the running Windows VM is forcibly stopped, the resources of the Windows system cannot be effectively recycled and residual files may exist in the registry.
After the VM is restarted, there is a possibility that a blue screen of death (5C) occurs.
Fault Diagnosis
Check whether the Windows VM has been forcibly started, or whether the host has been restarted or a power failure occurs in the running process of the VM.
Handling Procedure
The following are two solutions:
1. Shut down the VM and restart it.
2. Shut down the VM, change the bus type to ide, and restart the VM.
After the VM is started and the fault is rectified, shut down the VM again.
Switch the bus type to virtio, and restart the VM.
Generally, you can use solution 1 to rectify the fault when a blue screen of death (5C) happens to a Windows VM.
If this solution fails, you can use solution 2.
When a blue screen of death (5C) happens to a Windows VM, the dump file may not be analyzed.
To correctly analyze the dump file, you can install patches from Microsoft website.
The link is as follows: https://support.microsoft.com/zh-cn/kb/2528507/en-us?wa=wsignin1.0
Check After Rectification
The Windows VM works properly