Error message after you install a Windows update on a Windows XP-based computer: "rthdcpl.exe illegal system dll relocation"

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Article ID: 938222 - View products that this article applies to.
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You install a Windows update on a Microsoft Windows XP-based computer. After you restart the computer, you receive the following error message:
rthdcpl.exe illegal system dll relocation


To resolve this problem, follow these steps:
  1. Click Start, click Control Panel, and then double-click Add or Remove Programs.
  2. In the Add or Remove Programs dialog box, click to select the Show updates check box.
  3. Remove any software update whose name ends with any of the following text:
    • (KB928843)
    • (KB935448)
    • (KB925902)
  4. Restart the computer.
  5. Visit the following Microsoft Web site:
  6. Click Download, and then click Run. If the Download button is not available, you must first click Validate to validate your copy of Windows.
  7. Follow the instructions that appear on the screen to install update 935448.
  8. Restart the computer.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


Article ID: 938222 - Last Review: June 18, 2007 - Revision: 1.1
  • Microsoft Windows XP Home Edition
  • Microsoft Windows XP Professional
kbexpertisebeginner kbtshoot kbprb KB938222

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