I ran memtest on the 26th (post #11). I will run it again tonight unless I hear otherwise from you before then. If it doesn't show any errors do you suggest I run each stick separately? I have heard that will work better sometimes.
As for memtestG80, I'm sorry, but can you tell me how to use this program? I downloaded it and ran it from the start button, but it never asked me the size of the memory. I could see that it was only testing 128 mb. Then, after the test ended, it gave a message that it was uploading the data, but it never opened a window for me to see what the data was. It just closed. I must be using it wrong, but I can't figure it out.
I tried running it from the cmd prompt but just got a message that memtestG80 is not recognized. It's been so long since I used dos! I have no idea what to do.