Step 1: Open command Prompt as administrator
Step 2 : Use the following
bcdedit -set TESTSIGNING OFF (to disable and ON to enable) + Enter
Step 3 : Restart and you are Done
So why do we need testing mode from a layman point of view .Drivers are used to connect your devices to your computer and in case the drivers are not installed try enabling the mode .It will be useful when you install certain drives for android devices .
As I am a developer and I used it to install ABD driver on my Micromax FunBook Android tablet.
Hope you enjoyed Reading .