On Windows 11, if the computer is running sluggish and apps are crashing, or the system experiences a random Blue Screen of Death (BSoD), freezes, or reboots, the first thing you should check would be the memory to discard a problem with any of the modules. This is not only because memory issues can make the device unstable, but also because it could cause data corruption and other errors.
If you suspect the problem is related to the system memory, you can use the "Windows Memory Diagnostic," a legacy tool that can perform many tests to check your computer's Random Access Memory (RAM) to determine whether one or more memory sticks have problems.
In this Windows 11 guide, we walk you through the steps to use the Windows Memory Diagnostic tool to determine whether there's a faulty memory module on your computer.
How to diagnose memory problems on Windows 11
To run a memory check on Windows 11, close your running apps and use these steps:
- Open Start.
- Search for Windows Tools and click the top results to open the folder.
- Double-click the Windows Memory Diagnostic tool.
- Click the Restart now and check for problems option.
Upon restart, the tool will start testing the Standard mode right away. In this mode, the Windows Memory Diagnostic tool will run all the scans available in the Basic mode, in addition to LRAND, Stride6 (cache enabled), CHCKR3, WMATS+, and WINVC tests.
The Standard test mode should be enough to diagnose and find problems with the system memory, but you can also use the "F1" key to open the Windows Memory Diagnostic page to change the scan options.
On the settings page, you will find options to change the scan mode to Basic, which runs the MATS+, INVC, and SCHCKR (cache enabled) tests.
The Extended mode features every test available using Standard mode and MATS+ (cache disabled), Stride38, WSCHCKR, WStride-6, CHCKR4, WCHCKR3, ERAND, Stride6 (cache disabled), and CHCKR8.
You can also use the TAB key to change cache settings in the Windows Memory Diagnostic tool. If you disable the cache, it'll allow the tool to access the data in RAM directly for a complete test. In addition, you can also specify the times the scan will be repeated to test your system's memory modules.
Finally, press the "F10" key to return to the main page, and the scan will start automatically on the computer.
Check memory diagnostic results
Once the test completes, the device will restart and load Windows 11 again. If you want to check the results, you need to use the Event Viewer.
To check the Windows Memory Diagnostic results on Windows 11, use these steps:
- Open Start.
- Search for Event Viewer and click the top result to open the app.
- Expand the Windows Logs category.
- Right-click the System item and choose the Find option.
- Confirm the MemoryDiagnostics-Results keyword and click the Find Next button.
- Click the Cancel button.
- Double-click the MemoryDiagnostics-Results source on the right side.
- Review the diagnostic results.Quick tip: If the result reads "The Windows Memory Diagnostic tested the computer's memory and detected no errors," you can discard memory as the root of the problem.
If you get an error, run the extended memory and check the results again. If errors persist, there might be a physical error with a memory module.
The tool should be able to point out which memory module has a problem. If you can't determine which module is faulty, you may want to remove and test each module to find the one with the problem.
More Windows resources
For more helpful articles, coverage, and answers to common questions about Windows 10 and Windows 11, visit the following resources:
- Windows 11 on Windows Central — All you need to know
- Windows 11 help, tips, and tricks
- Windows 10 on Windows Central — All you need to know
Mauro Huculak is technical writer for WindowsCentral.com. His primary focus is to write comprehensive how-tos to help users get the most out of Windows 10 and its many related technologies. He has an IT background with professional certifications from Microsoft, Cisco, and CompTIA, and he's a recognized member of the Microsoft MVP community.
This seems like it will be easy enough to use. But I wonder, given that Windows Memory Diagnostic is an old app, I would think it is a 32-bit app. 32-bit addressing is restricted to 4 GB. I've got a laptop with 16 GB of RAM. My desktop has 32 GB of RAM. This is common with other Windows systems we have, for both Windows 10 and Windows 11. Will Windows Memory Diagnostic be up to the task, or should we use something else?
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