Black screen after Windows updates: how can we identify or prevent the cause?

I'd start by preventing Windows Update from installing display drivers and use the manufacturer's driver packages instead. Also check firmware and chipset updates. Microsoft-provided graphics drivers can occasionally cause problems even when the update itself looks unrelated.

There are several possible causes besides the update: antivirus or application-control software blocking Explorer, inaccessible mapped drives or DFS paths, printer-driver installation delays, or policies waiting on a network resource. Collecting event logs and comparing affected machines would help narrow it down, since the issue doesn't appear tied to one known update.

The fact that the cursor still works and Task Manager opens makes a basic display failure less likely. On some affected systems, restarting or terminating State Repository Service or WSAIfabric allows Explorer to load, although that isn't a guaranteed fix. It may be a shell or service startup issue rather than the graphics hardware itself.

The workaround is worth testing proactively. Running `powercfg /h off` disables hibernation and Fast Startup, so it can prevent problems caused by a bad hybrid-shutdown state. It isn't proof that a particular Windows update is responsible, but deploying that setting before patching may be a reasonable pilot test while you continue identifying the trigger.