After updating from Windows 7 Professional to Windows 10 on an HP Compaq DC7900 Small Form Factor PC the label printing functionality failed.
Although possible to edit labels with the on-board P-Touch Lite software, when trying to print, an error dialogue opens stating that the PC cannot communicate with the printer. The solution in my case was to update the editor software using the P-Touch Editor Lite Update tool from the Brother Support Site.
As a bonus the software seems to send the labels to the printer much more quickly than before.
This video on YouTube covers the same issue-
https://youtu.be/2gTUAj2jbPI
Subsequently on moving to a different PC I discovered shutting down the Quick Editor would cause the computer to ‘hang’ and be unusable until it had been re-booted. The partial fix for this was to make sure I used the Windows ‘Eject’ feature from the explorer window or the same feature in the Task-Tray tool (Remove Hardware or Eject media) after exiting the Editor or BEFORE switching off the QL printer itself.
Later I discovered that a ‘proper’ printer icon wasn’t appearing in the Devices & Printers dialogue and choosing the option to add a printer resolved all the issues.