A version 4 of the Windows installer for ejabberd has been released to fix a problem related to SMP support on Windows with Erlang R12.
If you have downloaded a previous version of the installer, and if it does not work for you, you can give another try with the latest release, from the ejabberd download page.
Erlang R12 is unsupported yet on Windows and will only be supported with the 2.0.2 release.
