Happy fun times: when you power on your computer, and your Bluetooth keyboard doesn’t want to power on. Being lazy, rather than fetch my trusty USB keyboard I simply used accessibility features to login.
Windows NT decided my Bluetooth dongle was nadda, and only gave a faint blue like power was coming through the port but no goodness. Migrating to a neighboring USB port, and lo and behold: it suddenly lights up. I seem to recall that some ballocks like this, is how it ended up in the port it was in.
I’m pretty sure that the day I believe a Windows desktop ever does Bluetooth, or even USB things well, the deepest levels of hell may have frozen colder than can be measured.