Running memory diagnostics is a critical step if your computer is experiencing frequent crashes, Blue Screen of Death (BSOD) errors, or performance lag. 1. Windows Memory Diagnostic (Built-in Tool)

Windows includes a native utility called mdsched.exe that scans your RAM for errors before the operating system fully loads. How to launch:

Press Windows Key + R, type mdsched.exe in the Run box, and hit Enter .

Alternatively, search for Windows Memory Diagnostic in the Start menu . Choose a schedule:

Select Restart now and check for problems to begin immediately (ensure all work is saved) .

Select Check for problems the next time I start my computer to queue the test for your next manual reboot . During the test: Your PC will restart into a blue screen environment.

The Standard test runs by default. To choose more rigorous options, press F1 to switch to the Extended test, which takes significantly longer but is more thorough . Viewing results:

Windows will automatically restart after the test completes .

Results often appear as a desktop notification. If not, open Event Viewer, navigate to Windows Logs > System, and filter for "MemoryDiagnostics-Results" . 2. Manufacturer-Specific Diagnostics (Pre-boot)

Most major PC manufacturers (like Dell, Lenovo, and HP) include proprietary diagnostic tools accessible before Windows starts. These are often more effective at identifying specific hardware failures.

How to perform a Memory RAM check using Windows Memory Diagnostics

Running memory diagnostics helps identify faulty hardware causing system instability, such as the Blue Screen of Death (BSOD), random crashes, or file corruption. Both Windows and macOS include built-in tools to scan physical RAM for errors. Windows Memory Diagnostic

Windows includes a built-in utility that runs before the operating system loads to ensure a clean testing environment. How to Launch: Press Windows Key + R, type mdsched.exe, and hit Enter.

Alternatively, search for Windows Memory Diagnostic in the Start menu. Execution:

Select "Restart now and check for problems" (save your work first).

The PC will reboot into a blue diagnostic screen. By default, it runs a Standard test.

Press F1 during the test to choose Basic or Extended options for a more thorough scan. Viewing Results:

After the test, the computer restarts. A notification with the results should appear in the system tray after you log in.

If no notification appears, open the Event Viewer and navigate to Windows Logs > System. Filter for MemoryDiagnostics-Results to find the detailed report. Apple Diagnostics (macOS)

| Error Pattern | Likely Cause | Action | | :--- | :--- | :--- | | Single bit error, same address, every run | One dead memory chip | Replace the specific stick. | | Random addresses, different bits | Faulty memory controller (CPU) or power regulation | Test RAM in a different PC. If passes, replace CPU/mobo. | | Errors only on cold boot | Cold solder joint or capacitor | RMA the motherboard or RAM. | | Errors only on Pass 5+ | Thermal expansion failure | Improve case airflow; replace RAM. |

For most users: The Windows Memory Diagnostic is a solid, quick first test. It’s reliable enough to confirm or rule out bad RAM as the cause of common system instability.

For power users or intermittent issues: Skip to MemTest86 on a USB drive — it’s more thorough and provides better reporting.

Rating: ⭐⭐⭐⭐ (4/5) for built-in convenience.

To run memory diagnostics on Windows, you can use the built-in Windows Memory Diagnostic Tool

. This utility restarts your computer and scans your RAM for physical errors that might cause crashes or instability. 1. Launch the Diagnostic Tool You can open the tool using one of these common methods: Search Bar:

Type "Windows Memory Diagnostic" into the Start menu search and click the app. Run Dialog: mdsched.exe , and hit Enter. Settings Menu: Microsoft Surface

or other Windows 11 devices, search for "memory" in the Settings panel and select Diagnose your computer's memory problems 2. Schedule the Test Once the tool opens, you will see two primary options: Restart now and check for problems (Recommended): Your computer will restart immediately to begin the scan. Save all work before clicking this Check for problems the next time I start my computer: This schedules the scan for your next manual reboot. Microsoft Learn How to run Windows Memory Diagnostics Tool in Windows

If you have multiple RAM sticks (e.g., two 8GB sticks) and only one is failing, you don't need to throw away both. Here is how to isolate the faulty module.

If your diagnostic tool reported even a single error, the situation is terminal for that stick of RAM. Here is your action plan: