3. Understanding, Independence and control. The desire to continue to have a working computer in future, and to have own control over that by knowing what went wrong, how to avoid it happening again and what to do after. "There I fixed it." does not help with this. It is low information and high dependence.

Some would draw the conclusion that the person doing this is deliberately maintaining high dependence. That may be paranoid (The tech person may just be overworked and find social explanations harder than fixing computers) but some do draw that conclusion.