How to Use Keyboard as Mouse in Windows

• You can Enable it by Pressing  Alt + Shift + Numlock keys. As soon as you do it, you will be prompt with the below dialog box, Just Click Yes to it.

• Make Sure your Numlock is Off while you Use keyboard as mouse.

• Done !!! Now you will see MouseKeys icon on your taskbar, which means now you are all set.

• Now talking about the Controllers,  Use 8,2,4 and 6 Keys from Numpad to move Up, Down, Left and Right Respectively.

Alternatively You can also use Third Party Program Called NeatMouse , This software is portable, Main advantage to use it is it gives you better Control because of additional options that it makes available. it have an option to Remap Controller keys according to your Comfort.
Probably we will have to Use Keyboard as Mouse temporarily and not for long time so one may not prefer to get third party software for this task, but many may do it as it is free and can be helpful.

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