: Open CMD, type mdsched.exe , and press Enter .
. Double-click the most recent log entry. Normal: The log states "Windows Memory Diagnostic tested the computer's memory and detected no errors". Errors Found: If errors are listed, it typically indicates a failing RAM module that may need to be replaced. YouTube +6 Pro Tip: If the built-in tool doesn't find errors but you still suspect RAM issues, professionals often use a third-party tool like MemTest86 for a more rigorous, multi-pass test. MemTest86 +1 Would you like to know how to
A log entry will appear. Here is how to translate the tech-speak: how to run a memory diagnostic windows 11
When RAM goes bad, it doesn’t always result in a computer that won't turn on. Often, it results in "flaky" behavior—data gets corrupted in transit, leading to mysterious crashes and blue screens. Thankfully, Windows 11 has a built-in tool to catch these invisible culprits: The Windows Memory Diagnostic.
If your PC is crashing randomly, take twenty minutes to run this test. It is the quickest way to distinguish between a software annoyance and a hardware emergency. : Open CMD, type mdsched
| | [✓ Pass – No errors found / ✗ Fail – Errors detected] | |------------|-----------------------------------------------------------| | Event ID | 1101 (Information) or 1102 (Error) | | Summary | [e.g., The Windows Memory Diagnostic tested the computer's memory and detected no errors.] |
Choose Restart Now .
To run a memory diagnostic in Windows 11, you can use the built-in tool , which scans your RAM for hardware faults. 1. Launching the Diagnostic Tool There are several ways to open the tool:
Once your PC restarts, Windows 11 leaves the standard desktop environment and boots into a blue diagnostic screen. Normal: The log states "Windows Memory Diagnostic tested
Once opened, you’ll see two options:
The fastest way to launch the diagnostic utility bypasses menus entirely by using a direct system command. Press to open the Run dialog box. Type mdsched.exe into the input field. Press Enter or click OK . Choose Restart now and check for problems . Method 2: Via Windows Search