By the time students arrive to high school, they have figured out how to fix most of their computer issues. If the mouse does not work, they change it for another. This may not be the best solution but it is the quickest form them. If the keyboard has missing keys, they swap it for another.
My students have problems with the tool such as Microsoft Excel. If we are entering formulas, they may forget to put an equal sign in. If there answer is wrong, they entered the formula incorrectly. These are all typical mistakes. I will have them work with a partner to determine the mistake. I encourage them to work together.