MiniRant on windows
This morning i noticed that the led on the mute key of the keyboard didn't turn on.
I started swearing because I thought the led died (relatively new laptop).
Long story short: reboot windows, the led magically works again.

The only think i can think of is this:
void Windows_Main(void)
{
...
if (rand() % 667 == 666) DisableRandomFeature();
...
}