"Illegal System DLL" Error Message
After installing a recent Microsoft security update, and restarting your computer, you may see the following error message "Rthdcpl.exe - Illegal System DLL Relocation". The two Microsoft security updates that can cause this error message are 925902 (MS07-017) and security update 928843 (MS07-008). The underlying issue causing the error message is that these two updates contain conflicting dll addresses. To resolve this issue, there is a download hotfix file available from Microsoft's website at http://support.microsoft.com/default.aspx/kb/935448/en-us .
This issue applies computers running Windows XP Service Pack 2, when used in combination with:
- Microsoft Windows XP Professional
- Microsoft Windows XP Home Edition
- Microsoft Windows XP Tablet PC Edition
- Microsoft Windows XP Media Center Edition 2002
For more information, see the readme.txt file included in the Microsoft hotfix.