Ah, thank you for the extra info
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Only thing missing is the complete and exact version of Windows Live Messenger and if you're using 32bit or 64 bit of Windows.
Anyways, to answer your question/remark: Win7 doesn't really know there is a new version though. That error is just a 'standard' message you get when there is some kind of dodgy error (now the only question remains is _what_ exact error/bug - and I suspect that's a hard one to crack). So, the message wasn't especially made for this version though, it existed already long ago. Proof of that, for example, is that the message still speaks of 'Patchou' who isn't affiliated anymore with Plus! and that it links to the old domain msgpluslive.com.
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