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Windows command reference

Windows Memory Diagnostic

Schedule the built-in Windows memory test, which restarts the PC and tests system memory before Windows loads normally again.

Risk: LowReviewed: 2026-09-17
mdsched

When to use it

Use when repeated stop errors or instability make memory a plausible branch, or Microsoft troubleshooting specifically calls for a memory check.

When not to use it

Save work first because the test restarts Windows. A clean result is useful evidence but does not prove every hardware fault is impossible.

Primary reference

Reviewed source