What does the Windows Blue Screen QR code do?

The QR code displayed on the BSOD screen links to Microsoft's support page for that specific stop code when scanned with a smartphone. It encodes a URL like https://www.microsoft.com/en-us/safety/pc-security/blue-screen/?stopcode=STOP_CODE. You can also manually visit that URL and replace STOP_CODE with your stop code (e.g., MEMORY_MANAGEMENT) to find Microsoft's official guidance.

Why does my PC get a blue screen at startup before reaching the desktop?

A BSOD at startup — especially stop codes like 0xc00021a, UNMOUNTABLE_BOOT_VOLUME, or INACCESSIBLE_BOOT_DEVICE — usually means the boot partition is corrupt, a critical system file is missing, or a low-level driver loaded at boot is crashing the kernel. Boot from a Windows USB → Troubleshoot → Advanced Options → Startup Repair to attempt automatic recovery. If that fails, use CHKDSK from the Recovery Environment command prompt: 'chkdsk C: /f /r /x', then run 'sfc /scannow' via the RE command prompt using 'sfc /scannow /offbootdir=C:\ /offwindir=C:\Windows'.

What causes MEMORY_MANAGEMENT and PFN_LIST_CORRUPT blue screens?

These stop codes (0x0000001A and 0x0000004E respectively) almost always point to RAM issues: physically failing RAM modules, RAM running at incorrect voltages or timings (especially with XMP overclocks), incompatible RAM, or a driver writing to an invalid memory address. First, reset your BIOS to default (disable XMP), then run MemTest86 overnight. If errors appear, replace the faulty stick. If no hardware errors are found, update chipset and memory controller drivers and run SFC to catch any OS-level memory management corruption.

How do I fix the nvlddmkm.sys (VIDEO_TDR_FAILURE) blue screen?

nvlddmkm.sys is the NVIDIA kernel-mode display driver. VIDEO_TDR_FAILURE means the GPU stopped responding and Windows could not reset it in time. Fix steps: (1) Boot Safe Mode, (2) Download Display Driver Uninstaller (DDU) from wagnardsoft.com, (3) Run DDU to fully clean the driver, (4) Download the latest NVIDIA driver directly from nvidia.com and install it. Also check GPU temperature with GPU-Z — if it exceeds 90°C under load, clean the GPU heatsink or repaste. For NVIDIA Optimus laptops, also update the Intel graphics driver.

My PC keeps restarting in a blue screen loop — how do I stop the auto-restart to read the stop code?

By default, Windows automatically restarts after a BSOD, making it hard to read the stop code. To disable this: Right-click This PC → Properties → Advanced System Settings → Startup and Recovery Settings → uncheck 'Automatically restart'. Alternatively, from the Recovery Environment, run: 'bcdedit /set {default} recoveryenabled no'. Once you can read the full stop code and note the faulting module name shown at the bottom of the BSOD screen, re-enable recovery and target your fix accordingly. You can also check Event Viewer ID 1001 (BugCheck) after the crash for the stop code without needing to see the BSOD itself.

Windows Blue Screen of Death (BSOD): Complete Troubleshooting Guide for All Stop Codes

Fix Windows Blue Screen errors including MEMORY_MANAGEMENT, SYSTEM_SERVICE_EXCEPTION, VIDEO_TDR_FAILURE & more. Step-by-step repair guide with real commands.

Last updated: March 1, 2026

Last verified: March 1, 2026

2,038 words

Key Takeaways

Hardware faults (failing RAM, corrupt storage, overheating GPU) are the most common root cause of recurring BSODs, responsible for 40-60% of cases.
Driver conflicts — especially GPU drivers (nvlddmkm.sys), filesystem drivers (ntfs.sys), and WDF violations — trigger the majority of software-related blue screens.
Corrupt system files, misconfigured Windows updates, or malware can cause stop codes like 0xc00021a, UNMOUNTABLE_BOOT_VOLUME, and boot loops.
Quick fix summary: Boot into Safe Mode, run 'sfc /scannow' and 'DISM /RestoreHealth', check Event Viewer for the faulting module, update or roll back drivers, then run Windows Memory Diagnostic to rule out RAM failure.

Fix Approaches Compared
Method	When to Use	Time	Risk
SFC + DISM Repair	Corrupt system files, random BSODs, failed updates	15-30 min	Low
Driver Rollback / Update	BSOD after driver/Windows update, nvlddmkm.sys, ntfs.sys errors	10-20 min	Low
Windows Memory Diagnostic / MemTest86	MEMORY_MANAGEMENT, PFN_LIST_CORRUPT, random crashes under load	1-8 hours	Low
CHKDSK /r	NTFS.SYS, UNMOUNTABLE_BOOT_VOLUME, disk-related stop codes	30-120 min	Low-Medium
Startup Repair / Recovery Environment	Boot loop, 0xc00021a, cannot reach desktop	10-30 min	Low
Clean Driver Install (DDU)	Persistent GPU BSODs, VIDEO_TDR_FAILURE, nvlddmkm.sys	20-40 min	Medium
System Restore / Reset	Multiple failed fixes, unknown cause, post-update loops	30-120 min	Medium-High
Hardware Replacement	MemTest86 errors, SMART failures, confirmed hardware fault	Variable	None (hardware)

Understanding the Windows Blue Screen of Death (BSOD)

A Windows Blue Screen of Death (BSOD) — technically called a Stop Error or Kernel Stop — occurs when the Windows kernel encounters a condition it cannot safely recover from. The system halts, dumps memory to a file (minidump or full dump), and displays a stop code. Modern Windows 10/11 BSODs show a QR code you can scan to look up the error online.

Every BSOD has:

A stop code (e.g., MEMORY_MANAGEMENT, SYSTEM_SERVICE_EXCEPTION, VIDEO_TDR_FAILURE)
A hex error code (e.g., 0x0000001A, 0xC0000005)
An optional faulting module (e.g., ntfs.sys, nvlddmkm.sys, wdf01000.sys)
A minidump file at C:\Windows\Minidump\ containing crash data

Step 1: Capture the Stop Code

If you can reach the desktop:

Open Event Viewer → Windows Logs → System. Filter by Event ID 41 (kernel power) or ID 1001 (BugCheck). The BugCheck event contains the exact stop code and parameters.
Check C:\Windows\Minidump\ for .dmp files. Use WinDbg or the free WhoCrashed tool to analyze them and identify the faulting driver.

If you are stuck in a BSOD loop (cannot boot):

Force-restart 3 times to trigger Automatic Repair, or boot from a Windows USB and choose Troubleshoot → Advanced Options → Startup Repair.
From the Recovery Environment (RE) command prompt, run: bcdedit /set {default} bootmenupolicy legacy to enable the legacy boot menu so you can press F8 for Safe Mode.

Step 2: Boot into Safe Mode

Safe Mode loads only essential drivers. Most software-related BSODs will not occur in Safe Mode, helping you isolate the cause.

From Settings: Settings → System → Recovery → Advanced Startup → Restart Now → Troubleshoot → Advanced Options → Startup Settings → Restart → Press 4 (Safe Mode) or 5 (Safe Mode with Networking).
From boot menu (F8): Requires legacy boot policy enabled via bcdedit above.

Step 3: Repair System Files

Run the following commands in an elevated Command Prompt or PowerShell (in Safe Mode if possible):

sfc /scannow
DISM /Online /Cleanup-Image /RestoreHealth

Restart after completion. SFC repairs corrupt protected system files. DISM fetches a clean copy from Windows Update if SFC cannot fix files itself.

Step 4: Identify and Fix the Faulting Driver

Common stop codes and their drivers:

Stop Code	Common Culprit	Fix
`VIDEO_TDR_FAILURE`	`nvlddmkm.sys` (NVIDIA), `atikmpag.sys` (AMD)	Reinstall GPU driver via DDU
`SYSTEM_SERVICE_EXCEPTION`	`ntfs.sys`, third-party AV drivers	Update or uninstall the driver
`MEMORY_MANAGEMENT`	RAM hardware, memory-mapped driver	Run MemTest86, check RAM seating
`PFN_LIST_CORRUPT`	RAM, SSD/HDD firmware	MemTest86, CHKDSK, update firmware
`KERNEL_SECURITY_CHECK_FAILURE`	Corrupt/incompatible driver or malware	SFC, driver rollback, antivirus scan
`UNEXPECTED_KERNEL_MODE_TRAP`	Overclocking, RAM instability	Reset XMP/OC, run MemTest86
`UNMOUNTABLE_BOOT_VOLUME`	Corrupt boot partition, ntfs.sys	CHKDSK, Startup Repair
`WDF_VIOLATION`	Faulty WDF kernel-mode driver	Update driver, check Windows Update
`0xc00021a`	Critical system process crash (winlogon, csrss)	SFC, DISM, System Restore
`NTFS_FILE_SYSTEM (ntfs.sys)`	Disk corruption, dying drive	CHKDSK /r, check SMART data

To remove GPU drivers cleanly (recommended for nvlddmkm.sys / VIDEO_TDR_FAILURE):

Boot into Safe Mode.
Download Display Driver Uninstaller (DDU) from Wagnardsoft.
Run DDU → Clean and Restart.
Reinstall the latest GPU driver from NVIDIA or AMD's official site.

To roll back a driver: Device Manager → Right-click device → Properties → Driver tab → Roll Back Driver.

Step 5: Check Storage Health

For UNMOUNTABLE_BOOT_VOLUME, NTFS_FILE_SYSTEM, or frequent disk-related crashes:

# From Recovery Environment or elevated CMD:
chkdsk C: /f /r /x

# Check SMART data using PowerShell:
Get-PhysicalDisk | Get-StorageReliabilityCounter | Select DeviceId, ReadErrorsTotal, WriteErrorsTotal, Temperature

# Or use wmic:
wmic diskdrive get status

If SMART reports errors or CHKDSK finds unrecoverable bad sectors, back up data immediately and replace the drive.

Step 6: Test RAM

For MEMORY_MANAGEMENT, PFN_LIST_CORRUPT, or UNEXPECTED_KERNEL_MODE_TRAP:

Windows built-in test: Search for "Windows Memory Diagnostic" → Restart now and check for problems. Results appear in Event Viewer under Source: MemoryDiagnostics-Results.

MemTest86 (more thorough): Download from memtest86.com, create a bootable USB, run for at least 2 full passes (overnight recommended). Any errors indicate failing RAM.

Also try: removing one RAM stick at a time, reseating sticks, or testing in alternate slots. Reset XMP/DOCP profiles in BIOS if you have overclocked RAM.

Step 7: Check for Malware

Some BSODs — particularly KERNEL_SECURITY_CHECK_FAILURE and unexpected stop codes — can be caused by rootkits or malware corrupting kernel-mode code.

Boot into Safe Mode with Networking.
Run Microsoft Safety Scanner (msert.exe) or Malwarebytes free edition.
After cleaning, run sfc /scannow again to repair any files damaged by the malware.

Step 8: System Restore or Reset

If all else fails:

System Restore: Control Panel → Recovery → Open System Restore → choose a restore point dated before BSODs started.
Reset this PC: Settings → System → Recovery → Reset this PC → Keep my files (or Remove everything for a clean slate).
In-place upgrade repair: Boot from Windows ISO → Run setup.exe → Upgrade → Keep files and apps. This reinstalls Windows without losing data.

Reading a Minidump with WinDbg

Install WinDbg Preview from the Microsoft Store. Open a .dmp file and run:

!analyze -v

The output will show the stop code, the faulting thread, the call stack, and the responsible module — giving you the exact driver or system component to target.

Frequently Asked Questions

powershell

# ============================================================
# Windows BSOD Diagnostic & Repair Script
# Run as Administrator in PowerShell
# ============================================================

Write-Host "=== Step 1: List recent minidump files ==="
$dumpPath = "C:\Windows\Minidump"
if (Test-Path $dumpPath) {
    Get-ChildItem $dumpPath -Filter *.dmp | Sort-Object LastWriteTime -Descending | Select-Object Name, LastWriteTime, Length
} else {
    Write-Host "No minidump folder found. Minidumps may be disabled."
}

Write-Host "`n=== Step 2: Check Event Log for BugCheck (BSOD) events ==="
Get-WinEvent -FilterHashtable @{LogName='System'; Id=1001} -MaxEvents 10 | ForEach-Object {
    Write-Host "Time: $($_.TimeCreated) | Message: $($_.Message.Substring(0, [Math]::Min(200, $_.Message.Length)))"
}

Write-Host "`n=== Step 3: Run System File Checker ==="
sfc /scannow

Write-Host "`n=== Step 4: Run DISM to repair Windows image ==="
DISM /Online /Cleanup-Image /CheckHealth
DISM /Online /Cleanup-Image /ScanHealth
DISM /Online /Cleanup-Image /RestoreHealth

Write-Host "`n=== Step 5: Check disk health via SMART ==="
Get-PhysicalDisk | ForEach-Object {
    $disk = $_
    Write-Host "Disk: $($disk.FriendlyName) | Status: $($disk.HealthStatus) | Usage: $($disk.Usage)"
    try {
        $rel = $disk | Get-StorageReliabilityCounter
        Write-Host "  ReadErrors: $($rel.ReadErrorsTotal) | WriteErrors: $($rel.WriteErrorsTotal) | Temp: $($rel.Temperature)C"
    } catch {
        Write-Host "  Could not retrieve reliability counter."
    }
}

Write-Host "`n=== Step 6: Schedule CHKDSK on next reboot (for C: drive) ==="
# Uncomment below to schedule:
# chkdsk C: /f /r /x
# Write-Host "CHKDSK scheduled. Restart to run."

Write-Host "`n=== Step 7: Check for Windows Memory Diagnostic results in Event Log ==="
Get-WinEvent -FilterHashtable @{LogName='System'; ProviderName='Microsoft-Windows-MemoryDiagnostics-Results'} -MaxEvents 5 -ErrorAction SilentlyContinue | ForEach-Object {
    Write-Host "Time: $($_.TimeCreated) | Result: $($_.Message)"
}

Write-Host "`n=== Step 8: List all non-Microsoft kernel drivers (potential BSOD culprits) ==="
Get-WmiObject Win32_SystemDriver | Where-Object { $_.State -eq 'Running' } | ForEach-Object {
    $file = $_.PathName -replace '\\\\?\\', ''
    try {
        $sig = Get-AuthenticodeSignature $file -ErrorAction SilentlyContinue
        if ($sig.SignerCertificate.Subject -notmatch 'Microsoft') {
            Write-Host "Third-party driver: $($_.Name) | File: $($_.PathName)"
        }
    } catch {}
}

Write-Host "`n=== Step 9: Check for pending Windows Updates ==="
Get-HotFix | Sort-Object InstalledOn -Descending | Select-Object -First 10 | Format-Table HotFixID, InstalledOn, Description

Write-Host "`n=== BSOD Diagnostic Complete. Review output above. ==="
Write-Host "Next steps:"
Write-Host "  - If SFC/DISM found errors: Restart and test"
Write-Host "  - If third-party drivers listed: Update or remove them"
Write-Host "  - If disk errors: Replace drive after backup"
Write-Host "  - For RAM issues: Run MemTest86 (memtest86.com)"
Write-Host "  - For GPU BSODs: Use DDU to clean-reinstall GPU driver"

Error Medic Editorial

The Error Medic Editorial team consists of senior DevOps engineers, SREs, and Windows systems administrators with 10+ years of experience diagnosing kernel crashes, driver conflicts, and system failures across enterprise and consumer environments. Our guides are built from real-world incident postmortems and validated against live test environments.

Sources

Explore More windows Guides

Acer Aspire Blue Screen of Death Fix: How to Stop BSOD Crashes on Acer Laptops

Fix Acer Aspire Blue Screen of Death errors fast. Step-by-step guide covering driver updates, RAM checks, overheating, and Windows repair commands.

Acer Aspire Blue Screen of Death Fix: Step-by-Step Troubleshooting Guide (BSOD Errors Solved)

Fix Acer Aspire blue screen of death errors fast. Covers MEMORY_MANAGEMENT, DRIVER_IRQL, KERNEL_SECURITY_CHECK and more. Step-by-step commands included.

Acer Aspire Blue Screen of Death Fix: Stop Codes, Causes & Complete Solutions

Fix Acer Aspire Blue Screen of Death errors fast. Covers MEMORY_MANAGEMENT, DRIVER_IRQL, KERNEL_SECURITY_CHECK_FAILURE & more with exact commands.