We are rolling this out with the Intune policies, and overall it appears to be working well. The new report in Autopatch looks great - thanks.

However, we have encountered a consistent issue with Dell OptiPlex 3040 and 7040 systems.

On these models, running the latest firmware and Windows 11 LTSC (unsupported, we understand), the machines lock up completely a few minutes after boot when network access is available. There is no blue screen or crash dump—the system simply freezes as if time has stopped. This behavior does not appear to occur when the network is disconnected.

These devices have been running since purchase in 2016 and have been using the same Windows 11 LTSC image since it was released, without prior issues.

We have confirmed that disabling Secure Boot in the BIOS immediately resolves the problem. Every OptiPlex 3040 and 7040 that has received this policy is affected.

These models must be on the known good list, but this specific configuration clearly does not work as expected.