Will not remember Password

Some sites require passwords for connection. Most sites give users the
option of remembering user names and passwords.

On SOME sites this works fine, however, on other sites (One example,
Comcast.net) the system will not remember a user name or password. Each time
I access the site I am asked to enter the info again despite checked box on
page and a window that asks if I want Windows to remember.

Security set to Med Low
Privacy set to Medium
Auto Complete, checked: user names and passwords on forms checked
Prompt me to save passwords, checked

How do I get windows to remember all passwords and user names????

Thanks