Hi,
I think your opinion is dangerous, you may have a try with the following method but it is not recommended.
Internet Explorer>>>Tools>>>Internet options>>>Security tab>>>Custom level>>>Scroll to the bottom>>>User Authentication, Automatic logon with current user name and password.
So you need to have a Windows system user account which is the same one to be filled automaticall for the most websites but not for all.
Ivan-Liu
TechNet Community Support
