Operating system cannot be simply customized. You do not have access to program important applications from OS. If you have enough knowledge to do this, you can simply customize it using some professional software like Visual C# or something like that. Anyway the result probably will be disappointing, because most of the OS' are built optimized and every little customization could ruin them.
There are far too many operating systems for a single comprehensive answer. Please specify which particular operating system you wish to customize.
The name of a file called ADutil and the exe stands for executable; a program file. It is A utilities package that allows you to customize windows operating systems.
Virtual operating system
When you network operating systems you will have the benefit of both operating systems. You have to ensure both systems are compatible before networking them.
Operating systems are not in applications. Applications are installed on Operating Systems.
what are the disadvantages of operating systems effects of information technology
several types of operating systems are there.
Single-user multitask operating systems are also known as network operating systems
Utilities
Two operating systems are; Windows, and Linux.
No they don't.
complete operating system that works on a desktop computers