Remembering your username and password is held in your browser settings.
Go to Settings in the top right hand corner of the browser window and select Internet Options from the menu (also available from Control Panel)
Click on Content Tab
Click on Settings button in the AutoComplete section
Tick or untick, as required, User names and passwords on forms and/or Ask me before saving passwords
Press the OK button on the AutoComplete Settings box and the OK button on the Internet Options box.
Go to Settings (the 3 horizontal lines in the top right hand corner) and select Settings from the menu
Scroll to the bottom of the settings page and click on the Show advanced settings
Scroll down to Passwords and Forms and ensure the options here are ticked
Close the Settings tab once done
Go to Settings (the 3 horizontal lines in the top right hand corner) and select Options
Go to Security in the left hand panel and tick Remember logins for sites