I'm not sure who's dealing with this now, but the installer for 1.51 on Windows is broken with multiple File Not Found (404) errors. The sourceforge directory it tries to access seems to not be a real folder. Or at least it appear strangely when browsed: http://sourceforge.net/projects/boost/files/boost-binaries/ Alex -- Swish - Easy SFTP for Windows Explorer (http://www.swish-sftp.org)