>>A machine has Windows Live Messenger 8.5. When signing in it indicates a new version is available which you can choose not to install but then you cannot sign in with old version. So you accept installation and what happens: installation is aborted without explanation after 75+% progress.
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>>What can be the problem? I logged as user with administrator rights.
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>I ran into the same situation. I uninstalled all Windows Live components and downloaded a fresh installer from their website and ran that. Then, the installation worked fine and everything is now working as expected.
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>Jon

Thank you Jon.

While to uninstall Windows Live components it looks for an unnamed program to which you are supposed to provide a path. Any suggestions/

Alex