Thanks for the feedback and for running the test!
Even though the update wasn't installed, the problem still occurred. A freeze during the memory test usually indicates a hardware issue with the memory itself. It could be faulty, or there might simply be dirt obstructing a contact point. Have you tried cleaning it?
In any case, when the new modules arrive, clean the memory slot before installing the new memory. Use a brush and, if you have it, some contact cleaner.