While I have seen my fair share of people using computers who are not very knowledgeable about computer use, I would tend to go with "not computer literate".
From my observations, many people become disinterested in the inner workings of the operating system, hardware, and programs based on one of the following:
1 - being intimidated by the apparent complexity of the system.
2 - only use the computer because they are - to some degree - forced to use today's technology.
The smart leader would see that educating the users, which requires an instructor who knows how to present information in ways that can be digested by the various learning styles of said users, is the most efficient way of improving the lack of knowledge and/or interest in computer use.
I have noticed that good instructors/teachers have the innate ability to convey information, and that successful business leaders do not necessarily have this talent. Usually, they (successful business leaders) have learned to delegate responsibilities in an efficient mannor.
For my part, I simply help someone set-up their desktop with simple, easy to understand shortcuts to the programs and functions they understand, and then wait until they request more functionality (which tends to occur once the user has begun to feel comfortable with the current set-up).