This Video Shows how to disable Automatic Windows Update to Reduce data usage if you are using Limited data pack.
Windows update is most annoying thing which Consumes High Amount of Data if you are in a Limited Data Plan
Updates may run in background but it will install at the time of shutdown and some updates in while starting the windows which displays "Configuring Windows update" .
This may slow down the windows login and may take your golden time from you .
To Know how to suppress the Automatic update Watch the above video.