Not sure if it happens to you guys or not but about once every 6 months my laptop does a Windows update that disables the backlight on my keyboard.
Each time it's been just long enough for me to forget how I fixed it last time.
Each time I watch YouTube videos and try all the suggestions until I work out that I have to go into Bios to turn it back on.
Surely this is some kind of programmers in joke.
When the missus phone updates, it kills our wifi for about 5 days