Just like with Memtest86, you'll need a working operating system like Windows, Mac, or Linux to create the bootable disc or flash drive, which can be done on a different computer than the one that needs testing. It might seem a bit strange that we rank Memtest86+ as the #3 pick, but since it's so incredibly similar to Memtest86, your best bet is to try Memtest86 followed by WMD, which operates differently, providing you with a more well-rounded set of memory tests. Memtest86+ is available in ISO format for burning to disc or USB. We'd recommend performing a memory test with Memtest86+ if you have any problems running the Memtest86 RAM test or if Memtest86 reports errors with your memory, and you'd like an excellent second opinion. When the computer restarts, the Windows Memory Diagnostic tool begins. Memtest86+ is a modified, and presumably more up-to-date, version of the original Memtest86 memory test program, profiled in the #1 position above.

Like these other tools, this one is entirely text-based and so might be hard to get used to for some people.

Windows 8 memory diagnostic