Here is a guide which gives you knowledge about Android Stock ROM VS Custom Rom. Android Stock ROM is an Operating System which is preinstalled on Android device while custom ROM is modified version of Stock ROM.
Now you can easily run two WhatsApp accounts on one phone without rooting.You just need to follow these simple steps to use two Whatsapp accounts.
VPN (Virtual Private Network) technology helps to make your public network a private one by hiding your IP. Here is the list of free VPN software for windows.
Diskpart is a CMD command used to create a partition on your disk drive. So if your disk drive is not responding when you connect it to your computer then you can fix it by doing repartition it using Diskpart.
USB debugging is a method to communicate with the device and computer. After Enabling USB debugging you can directly send data, install applications from your computer.
Need to access another computer remotely? Here is a technique to access any computer remotely from their Computer or mobile devices using Chrome Remote Desktop App