Answer:
computer maintenance is mostly cleaning the computer unit and checking if there are no problems in its hardware parts and software programs. It is important to do maintenance to check if something's wrong and proling the life of the computer
computer repairing is fixing a computer problems. There are many types of computer problems such as pc not turning on, virus in the system, computer heating problems, fans not spinning, no display in monitor and so much more problems. You can fix it by repairing the computer to a technician or by yourself if you know how.
