Windows BSOD Error 0x0000000D — MUTEX_LEVEL_NUMBER_VIOLATION Fix

What Does This Error Mean?

The 0x0000000D blue screen error means Windows detected a problem with how a driver or program is using a mutex. A mutex is a lock that prevents two programs from accessing the same resource at the same time. When a driver acquires these locks in the wrong order, Windows crashes to prevent data corruption. This error is also called MUTEX_LEVEL_NUMBER_VIOLATION.

Affected Models

Windows 10
Windows 11
Windows 8.1
Windows Server

Common Causes

A device driver is acquiring locks in the wrong order, violating Windows kernel rules
A recently installed driver is buggy or incompatible with your version of Windows
Malware or a rootkit has tampered with low-level system drivers
Corrupted Windows system files are causing incorrect driver behavior
A hardware component such as a network card or GPU is paired with a defective driver

How to Fix It

Restart your computer first. If this was a one-time crash, a restart may be all you need.

Note when the crash happened. If it followed a specific action like installing software or plugging in a device, that is a strong clue.
Uninstall any drivers or software installed recently. Go to Settings > Apps > Installed Apps, sort by date, and remove anything added just before the crashes started.

Third-party driver utilities, VPN software, and hardware drivers are common offenders.
Update all your device drivers. Right-click the Start button and open Device Manager. Look for yellow warning icons and right-click each one to update the driver.

Pay extra attention to network adapters, graphics cards, and storage controllers — these interact most closely with the kernel.
Run System File Checker to repair corrupted Windows files. Open Command Prompt as Administrator and type: sfc /scannow — then press Enter and wait for it to finish.

This scan can take 10 to 20 minutes. Do not close the window until it says 'Verification 100% complete.'
If crashes continue, use System Restore to roll back to a point before the problem started. Type 'Create a restore point' in the Start menu and click 'System Restore.'

System Restore does not delete your personal files. It only reverses recent system and driver changes.

When to Call a Professional

If this blue screen keeps appearing after trying the steps below, the cause may be a deeply corrupted driver or hardware issue. A technician can use advanced kernel debugging tools to identify exactly which driver is misbehaving. Do not ignore repeated crashes — they can lead to data loss if a disk write is interrupted.

Frequently Asked Questions

What is a mutex and why does it cause a blue screen?

A mutex is like a bathroom key — only one program can hold it at a time. Drivers must request and release these keys in a specific order set by Windows. If a driver grabs them in the wrong order, Windows detects the violation and crashes to prevent data corruption. This crash is the 0x0000000D blue screen.

Is this error caused by a virus?

It can be, but it is usually caused by a badly written or outdated driver. Malware and rootkits can also cause this error by tampering with system drivers. If you suspect a virus, run a full scan with Windows Defender or another reputable antivirus tool before updating drivers.

How do I find which driver caused the crash?

When the blue screen appears, Windows sometimes displays a driver file name like 'driver.sys'. Write it down if you can. You can also open Event Viewer (type it in the Start menu) and check Windows Logs > System for critical errors near the time of the crash. This often names the responsible driver.