When encountering the "KMODE_EXCEPTION_NOT_HANDLED" blue screen error, 1. First check the recently installed driver, enter safe mode to uninstall or roll back the driver, and use Microsoft basic driver test; 2. Update all drivers to the latest version, and prioritize the check of graphics card and motherboard related drivers; 3. Run memory diagnostic tools and disk scanning commands to troubleshoot hardware problems; 4. Completely uninstall third-party antivirus software and use Windows Defender instead. In most cases, the above method can be solved without the need to reinstall the system immediately.

"KMODE_EXCEPTION_NOT_HANDLED" is one of the common blue screen errors in Windows systems and usually occurs when an exception occurs in the system kernel mode but is not handled correctly. This problem is mostly caused by driver incompatibility or hardware problems. If you encounter this error, don’t rush to reinstall the system. First try the following troubleshooting and repair methods.

Check for recently installed drivers

This is one of the most common reasons. If you just updated or installed the driver of a certain device (such as graphics card, network card, sound card, etc.) before the problem occurs, it is likely that it is caused.

• Uninstall the recently installed driver : Enter safe mode, open Device Manager, find the recently updated device, and right-click to select "Uninstall Device".
• Rollback the driver version : If you just update the driver instead of a completely new installation, you can try rolling back to the previous version in "Properties".
• Temporary replacement for using Microsoft basic drivers (such as standard VGA graphics cards) : This allows you to quickly determine whether it is a problem with the driver itself.

It is recommended to give priority to checking the graphics card and motherboard related drivers, especially those from third-party manufacturers.

Update all drivers to the latest version

Sometimes conflicts between old drivers and new system patches can also cause such errors. Make sure all your critical hardware drivers are kept up to date:

• Manual update drivers using Device Manager
• Visit the official website of motherboard, graphics card, etc. to download the official recommended version
• It is not recommended to use third-party driver software to automatically update, it is easy to introduce unstable beta versions.

Pay special attention to check the status of the chipset, storage controller and graphics card driver.

Check memory and hard disk issues

Although not as common as drivers, hardware instability can also trigger this error. Focus on checking memory and hard disk:

• Run Windows Memory Diagnostic Tool (can be started by entering mdsched.exe while running)
• Use command prompt to execute chkdsk /f /r disk scan error
• If there are multiple memory sticks, try plugging and unplugging test one by one

This type of problem may not necessarily have a blue screen every time, but it will lead to system instability for a long time.

Disable or uninstall third-party antivirus software

Some non-Microsoft official security software (especially some domestic software-killing) will deeply intervene in the system operation at the kernel level, which is easy to conflict with system updates or other drivers.

• Completely uninstall third-party antivirus software (including residual services and drivers)
• Temporarily use Windows Defender to replace whether there is still an error

This step is often overlooked, but it is very efficient.

Basically these common methods. In most cases, it can be solved by driving adjustment. If you accidentally encounter a stubborn problem, you can also consider creating a new user account to test it, or performing system restoration to the point in time before the problem occurs. In short, don’t reinstall the system as soon as you come up. Many problems are actually not that complicated.

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