How to Use the Windows Memory Diagnostic Tool on Windows 11

If your computer is acting up with random restarts, slow performance, or the infamous Blue Screen of Death (BSOD), your RAM might be the culprit. Fortunately, Windows 10 and 11 come equipped with a built-in tool called the Windows Memory Diagnostic Tool to test your RAM for errors. Here’s how to use it effectively.

Why Test Your RAM?

RAM issues can lead to various problems, including crashes, performance drops, and graphics card errors. Testing your RAM with the Windows Memory Diagnostic Tool is a quick and easy way to rule out memory instability as the cause of these issues.

How to Run the Windows Memory Diagnostic Tool

There are multiple ways to access and run this tool. Choose the method you find most convenient.

1. Using the Control Panel

1. Open the Control Panel.
2. In the search bar, type memory and press Enter.
3. Click on Diagnose your computer’s memory problems under Windows Tools.
4. When prompted, select Restart now and check for problems.
5. Your computer will restart and load the Windows Memory Diagnostic Tool.

2. Accessing Through the Start Menu

1. Open the Start menu.
2. Type memory into the search box.
3. Click on Windows Memory Diagnostic from the results.
4. When prompted, select Restart now and check for problems.

3. Using the Run Command

1. Press the Windows logo key + R to open the Run dialog.
2. Type mdsched and press Enter.
3. When prompted, select Restart now and check for problems.

What Happens During the Test

Once your computer restarts, it will automatically load the Windows Memory Diagnostic Tool and begin testing your RAM. The default test mode performs two passes to thoroughly check your memory.

You’ll see a blue screen displaying:

• The test’s progress and completion percentage.
• A status report indicating whether any issues have been detected.

The system will restart automatically after the test completes, and results will be available for review.

Advanced Options

If you want to customize the test:

1. Press F1 during the diagnostic screen.
2. Choose between Basic, Standard, or Extended test modes.
3. Adjust settings like enabling or disabling the cache and increasing the pass count.
4. Use the Tab key to navigate and press F10 to apply your changes.

Checking the Results

After the test, Windows may display a brief notification near the clock with the results. If not, you can find them in the Event Viewer:

1. Open the Start menu and type Event Viewer, then select it.
2. Navigate to Windows Logs > System in the left-hand pane.
3. Click Action in the top menu, then Find.
4. Type MemoryDiagnostic in the search field and click Find Next.
5. Double-click the most recent entry to view the details.
6. Check the Details tab for a “Pass” or any listed errors.

What to Do If Errors Are Found

If the tool reports errors, it’s likely that your RAM is faulty. Here’s what to do:

1. Contact your RAM manufacturer to initiate an RMA (Return Merchandise Authorization) process.
2. Provide proof of purchase and details about the issue.
3. Replace the faulty RAM and re-run the diagnostic tool to confirm the new kit works properly.

Final Thoughts

Testing your RAM with the Windows Memory Diagnostic Tool is a straightforward way to identify hardware issues. If no errors are found, you can focus on other potential causes of your computer’s problems. If errors are detected, act promptly to replace the faulty RAM and restore your system’s performance.