XP Professional for Embedded Devices – Cannot change PID with MUI pack applied

Symptoms

If you have XP Professional Embedded with an MUI package – e.g. German installed and applied and you try to change the Product Key via the Telephone activation window (msoobe /a) the windows will just hang after you click “Change Product Key”.

Cause

The MUI pack files miss an important function in the javascript oobeutil.js. This file is located in the MUI pack directory under C:WINDOWSsystem32oobeMUIxxxx where xxxx stands for the language ID (e.g. 0407 for German).

Workaround

1. To solve this issue open the oobeutil.js file in the oobe root folder (C:WINDOWSsystem32oobe) and copy the function StorePID () to your clipboard.
2. Open the oobeutil.js in the MUI subfolder (C:WINDOWSsystem32oobeMUIxxxx) and paste the function to the end of the file.
3. Save the file

Alternatively you can also copy the whole file to the MUI subdirectory.