I wrote:
I uploaded an installer for the fifth release candidate of the upcoming LyX version 1.6.0 for Windows.
The installer for this, version 4.11 used the new Python 2.6. Unfortunately I forgot to add some Python files so that users without having Python installed weren't able to configure LyX leading to various problems.
I just uploaded installer version 4.12 that fixes this: http://developer.berlios.de/project/showfiles.php?group_id=5117&release_id=15325 Please report when there are still problems. sorry for the inconvenience and regards Uwe