PC Repair has become a huge business in the world of computers. While a decent number of computer problems can be fixed at home, a PC repair service will need to take care of the rest.
The problems that are are generally easy to fix are software or registry problems and can usually be solved by finding a solution to the problem online.
Hardware problems, in comparison, are harder to fix as a professional PC repair technician will need to handle delicate computer parts. If you are new to computers, it's imperative you call a PC repair technician because they are trained to deal with computers. Some PC repair services offer their services over the phone. Before you call a technician, make sure to backup your computer to keep any important information.
You can find all kinds of PC Repair information on the blogosphere at the Computer Repair Blog and the Support Nerds.