IE certificate . Continue to this website. Not working

Internet Explorer Certificate Security Warning, cannot continue (blocked)

But even if we click on "Continue to this website (not recommended).", nothing happens. totally blocked!

Because of the latest updates : KB2661254

IE prevents  connection to any website that use a certificate with less than 1024 bits key

To fix it, you can add a dword key in the registry :

HKEY_LOCAL_MACHINE\Software\Microsoft\Cryptography\OID\EncodingType 0\CertDLLCreateCertificateChainEngine\Config\
DWORD (32 bit) : MinRsaPubKeyBitLength
value : 512 (decimal)

Thanks: berneyi  of experts exchange