To get a stable installation I will recommend running more.groupware at Linux. But it is also possible to install more.groupware to run at the Windows platform. I have managed to get more.groupware to work both under Windows NT, Windows 2000, Windows XP and even Windows 9x (not so very stable).

Remember to make a tmp folder on the system partition (C:). If not you can get many strange PHP errors as the default php.ini file is set to use that temporary folder to e. g. session files.

You can of course also edit php.ini to use another temp folder (session.save_path = /tmp) if you want.