Computer problems may seem immensely complicated at first glance. But some are relatively easy to fix and can be done by the average Joe or Jane. On a scale of 1 to 10 (where 10 should only be performed by certified technicians who have no less than three electronic gadgets on their belt), replacing memory is usually about a 4. Installing a new hard drive is tougher (about 6 or 7), but still do-able. Replacing a video card or internal modem is no more than a 2.
A word of caution: Static electricity can kill the circuitry inside your computer. Before you reach for anything inside that box, ground yourself by touching the metal computer frame.