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How to Activate Code Integrity Checking for Drivers
Code integrity checking is a feature that ensures that only trusted and verified code can run in the kernel mode of Windows. It is part of the virtualization-based security (VBS) and memory integrity features that protect Windows from malware and other threats. Code integrity checking can also help you troubleshoot driver compatibility issues with memory integrity.
In this article, we will show you how to activate code integrity checking for one or more drivers using Driver Verifier Manager or the Verifier.exe command line. We will also explain what error codes mean and how to fix them if you encounter any problems.
What is Driver Verifier Manager
Driver Verifier Manager is a tool that helps you test and debug drivers. It can monitor the behavior of drivers and detect any errors or violations that might cause system instability or corruption. Driver Verifier Manager can also enable code integrity checking for drivers, which verifies that the drivers are signed and comply with the memory integrity requirements.
You can access Driver Verifier Manager by typing verifier in the Run dialog box or the Command Prompt. You can then select the drivers you want to test and choose the settings you want to apply. For more details, see Selecting driver verifier options.
How to Activate Code Integrity Checking for Drivers
To activate code integrity checking for drivers, you need to follow these steps:
Open Driver Verifier Manager and select Create custom settings (for code developers).
Click Next and check the box for Code integrity checks.
Click Next and select the drivers you want to test. You can choose all drivers, only unsigned drivers, or specific drivers.
Click Next and choose where to save the settings. You can save them in the registry or in a file.
Click Finish and restart your computer to apply the changes.
You can also use the Verifier.exe command line to activate code integrity checking for drivers. For example, to enable code integrity checking for all drivers, you can use this command:
verifier /flags 0x20000 /all
To disable code integrity checking for all drivers, you can use this command:
verifier /reset
You can also specify individual drivers by using their names or IDs. For more details, see Using Driver Verifier to identify issues with Windows drivers.
What are the Error Codes for Code Integrity Checking
If code integrity checking detects any violations or errors in the drivers, it will generate a bug check with a stop code of 0xC4 and a parameter of 0x2000 to 0x2005. The parameter indicates the type of violation or error that occurred. Here are the possible values and their meanings:
Error CodeDescription
0x2000The caller specified an executable pool type.
0x2001The caller specified an executable page protection.
0x2002The caller specified an executable MDL mapping.
0x2003The image contains an executable and writable section.
0x2004The image contains a section that is not page aligned.
0x2005The image contains an IAT located in an executable section.
To fix these errors, you need to update or replace the driver that caused them. You can use the Driver Downloader tool to find and download the aa16f39245