14/04/2026
A domain controller reporting unexpected shutdowns after every patch night is easy to ignore... until it isn’t....
What looks like a minor annoyance can quietly lead to AD corruption, SYSVOL issues, or DNS failures. By the time those appear, tracing it back to a Hyper-V timing issue during Windows Update isn’t obvious.
We’ve broken down the root cause and a straightforward fix here:
👉 https://www.aggia.co.uk/hyper-v-windows-update-reboots-causing-unexpected-vm-shutdowns/
If your servers are showing odd behaviour after patching, it’s worth taking a closer look.