The KMODE_EXCEPTION_NOT_HANDLED error is a common Blue Screen of Death (BSOD) that appears when Windows encounters an exception in kernel mode that the operating system cannot handle.
When this error occurs, your computer may suddenly crash and display a message like:
“Your PC ran into a problem and needs to restart.”
Stop Code: KMODE_EXCEPTION_NOT_HANDLED
This problem usually indicates issues related to drivers, system memory, or corrupted Windows files.
The error commonly appears on computers running:
- Windows 10
- Windows 11
In this guide, you’ll learn what causes the KMODE_EXCEPTION_NOT_HANDLED error and how to fix it step by step.
What Causes KMODE_EXCEPTION_NOT_HANDLED?
This error occurs when a program or driver running in kernel mode generates an exception that Windows cannot recover from.
Common causes include:
- Corrupted or outdated drivers
- Faulty RAM
- Incompatible hardware
- Damaged Windows system files
- Conflicts after Windows updates
In many cases, the problem starts after installing new drivers or hardware.
Method 1: Restart Your Computer
Sometimes the crash is caused by a temporary system conflict.
Restart your computer and check if the error appears again.
If the problem persists, continue with the solutions below.
Method 2: Update Device Drivers
Outdated or incompatible drivers are one of the most common causes.
Steps:
- Right-click Start Menu
- Select Device Manager
- Expand device categories
- Right-click a device
- Click Update driver
Drivers to prioritize:
- Graphics drivers
- Network drivers
- Storage controllers
Updating drivers often resolves system conflicts.
Method 3: Run System File Checker
Corrupted Windows system files can trigger kernel exceptions.
Use the built-in repair tool:
- System File Checker
Steps:
- Open Command Prompt as Administrator
- Run the command:
sfc /scannow
This scan will detect and repair corrupted Windows system files.
Method 4: Repair Windows Image Using DISM
If SFC cannot repair all files, use the Windows image repair tool:
- Deployment Image Servicing and Management
Run the command:
DISM /Online /Cleanup-Image /RestoreHealth
This command repairs deeper Windows system corruption.
Method 5: Check RAM for Memory Problems
Faulty RAM can cause kernel-level exceptions.
Use the built-in memory testing tool:
- Windows Memory Diagnostic
Steps:
- Press Windows + R
- Type:
mdsched.exe
- Choose Restart now and check for problems
The system will reboot and scan the RAM for errors.
Method 6: Check Disk for Errors
Disk corruption can also trigger system crashes.
Run the disk repair command:
chkdsk /f /r
This tool scans your drive and repairs file system errors.
Method 7: Install the Latest Windows Updates
Windows updates often include stability fixes and driver improvements.
Steps:
- Open Settings
- Click Windows Update
- Install available updates
Keeping Windows updated helps prevent compatibility problems.
Related Windows Error Fix Guides
You may also encounter other Windows crash errors. These guides can help:
• How to Fix DRIVER_POWER_STATE_FAILURE
• How to Fix VIDEO_TDR_FAILURE Blue Screen
• How to Fix MEMORY_MANAGEMENT Error
These are among the most common crashes in Microsoft Windows systems.
Frequently Asked Questions
What does KMODE_EXCEPTION_NOT_HANDLED mean?
This error occurs when a kernel-mode program or driver generates an exception that Windows cannot handle.
Can faulty drivers cause this error?
Yes. Incompatible or outdated drivers are one of the most common causes.
Is this error related to RAM problems?
Yes. Faulty RAM can cause kernel exceptions that trigger this blue screen.
Final Thoughts
The KMODE_EXCEPTION_NOT_HANDLED blue screen usually occurs due to driver conflicts, faulty RAM, or corrupted system files.
Most users can fix the problem by:
- Updating device drivers
- Repairing system files using SFC
- Repairing Windows image using DISM
- Testing RAM using Windows Memory Diagnostic
- Checking disk errors
After applying these fixes, your computer should stop experiencing unexpected crashes.