Microsoft has issued a patch for anyone running the Realtek Audio Control Panel.

After installing the April 3, 2007 CRITICAL update Microsoft Security Bulletin MS07-017

You may receive this error upon reboot: "Illegal System DLL Relocation"

Here is the PATCH

CAUSE
This problem may occur after you install security update 925902 (MS07-017) and security update 928843 (MS07-008). The Hhctrl.ocx file that is included in security update 928843 and the User32.dll file that is included in security update 925902 have conflicting base addresses. This problem occurs if the program loads the Hhctrl.ocx file before it loads the User32.dll file.