Hello
This is a program I used when I was worried about my memory.
GoldMemory v5.07 - PC Memory Diagnostic Tests
hxxp://www.goldmemory.cz/
It runs in dos and it does take a long time to test the memory but it is very thorough
I think I was told about it from someone on this forum but I can't remember who to give the thanks too
Good Luck
Mayostudent