Hi
Sorry for the inconvenience.
Before going further, I would appreciate your help in clarifying the following situations:
- How was the active hour configured? Through Settings or Group Policy?
- Was your computer in a domain?
- Were there any notifications before your computer applying the update?
There might be conflict between the existing configuration and GPO setting of Active Hour
You could try these methods to configure Active Hour
- Configuring active hours with Group Policy:
https://learn.microsoft.com/en-us/windows/deployment/update/waas-restart#configuring-active-hours-with-group-policy - Configuring active hours through Registry:
https://learn.microsoft.com/en-us/windows/deployment/update/waas-restart#configuring-active-hours-through-registry
Please note: method 2 should only be used when neither Group Policy or MDM are available.
Reference: Manage device restarts after updates
I hope this information above can help you.