Guide. An iron test checks the amount of iron in the blood to see how well iron is metabolized in the body. Iron (Fe) is a mineral needed for hemoglobin, the protein in red blood cells that carries oxygen. Iron is also needed for energy, good muscle and organ function.
The following errors are the most common symptoms of faulty (or failing) computer memory modules: 1  Computer memory errors. 2  These include system computer memory errors, or blue screen system crashes that reference memory read/write, parity, interrupt, address, page faults, general protection faults or mismatch errors.
6. Problem: During normal, everyday use, Windows places fragments of files you create and delete throughout your hard drive â instead of in just one location. This can cause your computer to slow down. Solution: You can speed up your slow computer by defragmenting the hard drive.