See here: http://billing.handsonwebhosting.com/knowledgebase.php?actio...
As he says:
"I haven’t checked whether Windows SmartScreen does in fact use SSLv2, but the fact that the Microsoft servers support it is concerning."
Yeah, maybe check next time before you shout that the sky is falling.
If you are concerned about the privacy issue (MS getting requests indicating what was installed - not the bogus MITM claim), disabling this is offered in the privacy settings, and it is even put in front of your face during OS install. Also, all major AV products do the same thing, except they're not as transparent about it.
Nothing to see here.