64 bit Windows

From AzureusWiki

since there currently is no official x86-64/EMT64 SWT build Azureus is only available as 32 bit version and should be run under a 32bit Java Runtime.

Experimental 64 bit version

1. Download the normal windows version and unpack it
2. replace the swt libs (swt*.dll and swt.jar) with the ones from the 64bit packages for windows [click on more under Development]
3. to run Azureus as 64bit version you'll have to launch it manually, i.e. you can't use the azureus.exe launcher.

Read also the note in Vuze JIRA about possibly forthcoming 64bit support in Vuze, which note also mentions a beta version of 64bit launcher. (September 2009)

See also

Windows Vista for additional advise running Azureus under vista or vista 64bit