PWA always logged in as System Account

Issue:

Some days back one of my friend faced a weird issue, whenever he opened the PWA, it gets logged in as System Account user and not with windows user.

This happens even logged in as Different user using my window account and closed my session/browser.
And again when he re-opened the PWA, again logged in as System account.

 Resolution:

Check following settings in IE

IE options > Security > Local Intranet > Authentication > Custom Level > User Authentication > Prompt for user name and password

Another thing may cause the issue is the System Account credentials have been stuck in machine so to remove it

• Navigate to the control panel on your local machine.
• Select User Accounts
• Select Manage Your Credentials (Windows 7).  May have been “Advanced”

in other Windows versions.

• Remove the credential tied to the site

While the time I am posting this post I have one question in my mind is that what if the current user from SharePoint site hasn’t access to PWA site.

Please let me know if you have any queries.