I discovered that on a Windows XP if you remove the old Windows Messenger that came with the OS using: RunDll32 advpack.dll,LaunchINFSection %windir%\inf\msmsgs.inf,BLC.Remove after running 'WLM9 Switchless.exe' you will get an error saying that it is looking for 'wlm.msi' in the temp directory. I have found that if you run the command to remove the old version first then run 'WLM9 Switchless.exe' you will not get the error. elajua: Thanks for the great work you are doing to make our lives easier!