RE: Windows Messenger Plus! Live is not appearing on My Windows messenger. Help me!
If you are using SmileyCentral or SweetIM uninstall that and try again.
If not that then you most likely have programs running wich prevent writing in the registry or you tried to install it on an account without admin priviledges. In that case close down that program and or if you are not sure wich program and/or wether or not your windows account has enough priviledges reboot into safe mode and try to install on the account called "administrator".
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