MemTest is a
RAM reliability tester that runs under Windows. It
evaluates the ability of your computer's memory to store
and retrieve data accurately. A correctly functioning
computer should be able to do both these tasks with 100%
accuracy day in and day out. A computer that fails these
tests, perhaps because of old hardware, damaged
hardware, or poorly configured hardware, will be less
stable and crash more often. Even worse, it will become
even less stable over time as corrupted data is written
to your hard disk.