The Memory Diagnostic Tool usually takes around 15 minutes but can extend for hours depending on the memory size. It can even get stuck, but if all you are getting is a black screen, the issue is ...

but you don't have spare RAM to test your theory, then you can use MemTest86. This is a slightly older diagnostic tool, but ...

To troubleshoot and diagnose memory leaks, you can use some of the following tools. Performance counters can be a great way to monitor the memory usage and performance of your application.