I have a Windows installer that fails on a German version of Windows XP, SP3, issuing the code 1722. The user has run the installer with logging enabled, and the failure occurs when an executable bundled with the installer is run.
The user has tried running the same executable in a command window, both from the directory where the executable is installed and using the full path. In both cases, the executable succeeded. FWIW, the user has Administrator privileges.
I've tried running the installer on a German version of Vista; no problem.
I've tried running the installer on (an English version) of XP, using install directories containing spaces and accented characters; no problem.