There are several software memory test routines that can test your RAM to see
if it is faulty. They don't directly isolate the faults, however. In
addition, the fact that the memory modules did not error out during the tests
(even when run over the recommended minimum duration) does not guarantee that
the modules are free from error. The fact that the DID error doesn't not
guarantee that the modules would not work flawleessly in another slot or
another computer.
That said, "memory errors" in Windows doesn't necessarily guarantee that the
errors occurred in physical RAM. Remember, your computer uses part of your
hard drive as a type of memory and the inability to "read" the memory
location could point to another problem than the physical memory. If
something isn't where the system expects it to be, the system may tell you
that it can't find it. Reminds me of my children looking for their socks,
actually. They tell me "They're gone" when what they mean is that they
aren't on the floor where they left them.
