Final answer:
Windows Memory Test is the diagnostic tool that should be used to qualify a memory issue.
Step-by-step explanation:
The diagnostic tool that should be used to qualify a memory issue is Windows Memory Test. Windows Memory Test is the diagnostic tool that should be used to qualify a memory issue. This tool is specifically designed to test the RAM (Random Access Memory) of a computer and diagnose any memory issues.
It is built into the Windows operating system and can be accessed by following the steps: 1) Press the 'Windows key + R' and type 'mdsched.exe' in the Run dialog box, 2) Choose either to restart the computer and check for problems immediately or to check for problems the next time the computer restarts.