We have been trying to determine the best default configurations for our client base. Seems that without enabling the "Always enable pre-boot USB support (auto otherwise)" we end up with all sorts of strange USB mouse/KB issues. These have been wired or wireless and rather numerous since upgrading from 5.1.7 to 5.1.8.
Concern being to re-enable this setting breaks the Windows Safe Mode access via the F8 post boot protection login screen. If we enable this setting globally, I don't want to introduce more problems than I was expecting.