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c000021a Error (Windows Embedded Standard 2009)

4/23/2012

Learn what to do when you receive this error message.

  1. Identify missing dependencies. For information, see Checking Dependencies in Windows Embedded Standard Studio Help.

  2. If you determine that a dependency is not missing, then the error probably occurred because a file that the driver depends on is missing. Use the Microsoft® Visual Studio® Depends utility, which runs using the Depends.exe file, to view the statically loaded libraries. The libraries are located in the import section of the binary file. Search for required files that are missing from your run-time image.

When you attempt to boot your target system, a blue screen is displayed with the message "c000021a".

The most common cause of this error is a missing device driver dependency. This can occur even if the device driver is not critical for the system to boot. For example, Redbook.sys is not required to boot the system. But if one of its dependencies, Ks.sys, is not included in the run-time image, the system displays the error code 0xc000021a.

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