Found the work around here: http://blog.oracle48.nl/internet-explorer-10-continue-to-this-website-option-missing/ To skip all the text on this page to the command one needs to unblock this restriction and for example set the minimum key length to 512; run the following in a elevated command line (cmd.exe ‘run-as-administrator’):
certutil -setreg chain\minRSAPubKeyBitLength 512
Now the “Continue to this website (not recommended).” is back If you want to revert this change and go back to the default of an 1024 bit key minimum, run:
certutil -delreg chain\MinRsaPubKeyBitLength