I have always applied every Windows Update including Optional Driver updates.
However, I have encountered an optional Driver update that caused issues with my Bluetooth keyboard.
The keyboard is a standard Microsoft Bluetooth keyboard and mouse combo that I am using on my HTPC NUC.
The driver update was for the “Intel ® Wireless Bluetooth ® device.
Fortunately, I remembered what drivers had been updated and I was able to roll back the driver as soon as I noticed that the keyboard would not connect automatically at start and would regularly lose the connection, even though it was still noted as “connected” in All Settings. Surprisingly, the mouse was not affected.
As soon as I rolled back the driver the issue was resolved.
In future I think I will wait for driver updates via the normal Windows Update.