Managed to download it to something called My Kindle and can read it through a web page called “Cloud Reader” Dunno why the PC reader will not run. Tried uninstalling and cleaning the regeistry several times, still nothing when trying to open the program. It is indeed installed in Amazon\Kindle, so who knows. Maybe XP is not as supported and debugged.
Glad yo got it, but XP is supposed to be supported.