If the health certificate indicates a problem the computer could be prompted to download a missing patch or update its anti-virus settings.

BBC: Sick PCs should be banned from the net says Microsoft

His proposal, presented at the International Security Solutions Europe (ISSE) Conference in Berlin, Germany, is for all computers to have a "health certificate" to prove that it is uninfected before it connects to the net.

BBC: Sick PCs should be banned from the net says Microsoft

To get any category one or four weapons, like the Glock or the Sig Sauer used in Newtown, you need to be 21, to have joined a shooting range for the last six months, provided a blank criminal record and a certificate of physical and mental health not older than two weeks.

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New York City's board of health and mental hygiene has resisted pressure to change its birth certificate policy.

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The certificate will not be a cash card to buy health services.

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