If all the errors are on the same RAM module, get it replaced. Correctable, means that only one bit was bad in a word, so the error correcting circuitry was able to calculate its correct value by using extra bits that are stored in each word. Errors should be rare, and not confined to one memory module. If the memory module is good, the only errors should be those caused by radiation, such as cosmic rays, decay of trace radioactive elements in the memory package, a local nuclear reactor explosion, or global nuclear war. Multiple errors in just one module mean that something in it is just on the edge of not working, and it should be replaced. Multiple errors in all the modules means head for your fallout shelter.