How to Fix Windows Memory Diagnostic Issues on Windows
Windows Memory Diagnostic tool not running, getting stuck, or showing errors? Fix RAM testing issues and understand memory diagnostic results.
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Main Troubleshooting Guide
How to Fix Blue Screen of Death (BSOD) →Complete symptoms, causes, and step-by-step solutions
Symptoms
You might be experiencing this problem if you notice:
- •Memory Diagnostic stuck at a percentage for hours
- •Test never completes and PC restarts
- •Results don't appear after test completes
- •"Hardware problems were detected" result
- •Memory Diagnostic won't start from boot
- •Blue screens persist after diagnostic says RAM is fine
Common Causes
- ⚠Faulty RAM stick causing test to hang
- ⚠Memory Diagnostic results not persisting to Event Viewer
- ⚠Extended test taking too long (can take 8+ hours)
- ⚠BIOS memory settings (XMP) causing instability
- ⚠RAM not fully seated in slot
- ⚠Multiple RAM sticks with different speeds
Solutions
Solution 1: Run Memory Diagnostic Properly
- 1Press Windows + R, type mdsched.exe
- 2Choose "Restart now and check for problems"
- 3After restart, the test will begin automatically
- 4Press F1 to change to "Extended" test for thorough checking
- 5Standard test takes ~20 minutes, Extended can take 2+ hours
- 6PC will restart with results when complete
Solution 2: View Diagnostic Results
- 1Results may not show as a notification — check Event Viewer
- 2Press Windows + R, type eventvwr.msc
- 3Go to Windows Logs > System
- 4Click Find (Ctrl+F) and search for "MemoryDiagnostics-Results"
- 5The event will show either "no errors" or detail the problems found
Solution 3: Physically Test RAM
- 1If diagnostic finds errors: shut down and unplug the PC
- 2Remove all RAM sticks
- 3Insert ONE stick at a time and run the diagnostic
- 4This identifies which specific stick is faulty
- 5Also try each stick in different slots
- 6Replace the faulty stick — mixing RAM brands can cause issues too
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