this is a mere adobe bug - they changed the installer & it wont support installation on windows 2000 system any longer. adobe doesn't seem as it is going to fix this bug, see [https://bugbase.adobe.com/index.cfm?event=bug&id=3120661]. you might want to try this installation method provided by a 3rd-party-site: [http://www.ortwinpinke.de/en/2012/03/13/install-adobe-flash-player-11110262-and-later-under-windows-2000/] please note that mozilla firefox won't support the windows 2000 platform any longer after the release of version 12 of the browser & the system is no longer supported or kept up to date with security fixes by microsoft too. in order to keep your computer & personal information on it safe you may consider upgrading to a newer system.