Windows 10 often uses your internet bandwidth invisibly in the background which can play havoc with your data allowance if you’re using a portable hotspot.
To stop Windows 10 devouring your cellular data allowance in the background:
Go to Settings, then Network & Internet.
Select Wi-Fi and then Advanced Options.
Click “Set as metered connection” to on, and Windows will stop fetching non-essential data in the background, such as app updates and Start screen tile updates.
Oddly, this tip doesn’t work if your PC connects to the internet via Ethernet.