How To Run A Memory Diagnostic Windows 11 Jun 2026

If you want to be thorough, press F1 while the tool is running. This allows you to change the test mix to "Extended," which is much more rigorous but takes significantly longer. For most users, "Standard" is perfectly fine.

Turn on your PC and immediately press (or your manufacturer's recovery key). Navigate to Troubleshoot > Advanced options . Click on Command Prompt . Type mdsched.exe and press Enter . Understanding the Test Phases how to run a memory diagnostic windows 11

| Setting | Value | |---------|-------| | | Windows Memory Diagnostic | | Test Type | [Basic / Standard / Extended] | | Number of Passes | [Default is 2 for Standard] | | Cache Setting | [Default / On / Off] | If you want to be thorough, press F1

Running a memory diagnostic is like checking the foundation of your house. If the foundation is cracked (bad RAM), no amount of painting the walls (reinstalling Windows) will fix the problem. Turn on your PC and immediately press (or

Save all your work before clicking "Restart now." The tool shuts down Windows immediately to take control of the hardware.