i got an interesting issue and haven't figured out any clue to fix it.
a Toshiba laptop (Satellite C855D-S5950) running Windows 10 shuts down its WiFi on its own.
the issue was initially noticed as the user could not press F12 key to switch wireless on or off, then i noticed that actually WiFi and Aeroplane Mode both not worked. WiFi adapter looks fine under Device Manager, and the adapter's Properties look fine as well. no WiFi adapter settings in BIOS.
in Windows 10 Settings > Wireless, WiFi is shown off. if you switch it on, then it will switch off after a short while.
do you have any clue about what's going on there?