As a developer, we often require proceeding with IE browser despite with the certificate error. Microsoft decided to block this completely "trying" to fool-proof phishing and other hacking attempts. But, this is a nuisance to developers. This is how you allow it.
1) Run cmd as administrator
2) Execute the following command as an administrator:
certutil -setreg chain\EnableWeakSignatureFlags 8
3) Restart the computer