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.
Sometimes computer freezing is a sign of your system being infected with the virus. Check our Top 10 Computer Virus Symptoms Checklist to see if any of the symptoms for poor computer performance look familiar: Inaccessible Disk Drives. No Response. Slow Performance. Slow Startup. Crashing (Hanging/Freezing) Missing Files.