What is considered an unethical use of computer resources?

The answer is "hacking".

Explanation:

Buy a single-user version of the software and install it into more than one computer is known as unethical use, which is also known as hacking. it is just the act of acquiring illegal access to the system, or community several systems and networks.

It is performed by breaking passwords and codes, that allow access to the systems. It obtains access to login via hashing algorithms algorithm schemes.