Note- Before starting the method make sure that the battery of your device is not too low.
So lets began with the method-
1- First of all you should have a internet connection on your device as we have to download a apk file named as KingRoot.
To download KingRoot for android click here
To download KingRoot for Windows click here
2- Once you have installed it on your device, your 90% work is completed.
3- Now the last step is to run the application and wait until the rooting is done.
Congratulation, your device will be rooted after few minutes.