It looks like you're making progress.

Lsdme recommended HCI MemTest: RAM reliability tester for Windows for memory testing in windows.
They have FAQ and user manual links on the web page.
Right now my system has 5400 MB of free memory, so I would run four instances of HCI Memtest with each test using about 1200 MB of memory and let the test run until each test completed 200 - 300%.

Prime95 and OCCT are also excellent stress tests but they need to run for a much longer time.

We can pick up later when you get back.

Have a safe trip.