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Internet Explorer Enhanced Security Configuration dialog box
How to disable the IE ESC dialog box ^
I have to add another warning. On Windows Server 2012, I sometimes noticed a strange behavior when I followed the above procedure. Whenever I wanted to launch Internet Explorer from the Modern UI Start Screen, I got the message “This app can’t open – Internet Explorer can’t be opened using the Built-in Administrator account. Sign in with a different account and try again.”
Internet Explorer can’t be opened using the Built-in Administrator account
It appears to be a Windows Server 2012 Modern UI bug because opening Internet Explorer from the desktop worked without problems. Undoing the settings described above doesn’t solve the problem. Note that this didn’t happen on all Windows Server 2012 systems.
How to enable the IE ESC prompt ^
There is another strange thing with the IE ESC dialog box. It seems there is no setting in Internet Explorer to get the prompt back once you disable the “Continue to prompt when website content is blocked” checkbox so that you can add sites again to the Trusted sites zone.
The IE ESC description of Windows Server 2008 R2 mentions a setting (Display enhanced security configuration dialog) in the Advanced tab of Internet Options to enable the IE ESC prompt again. However, there is no such setting. The corresponding Windows Server 2012 document no longer contains the passage.
I know of two ways to enable the dialog box again. One is to reset Internet Explorer settings in the Advanced Tab of the Internet Options. Note that restoring the advanced settings isn’t enough. The downside of this way is that all your Internet Explorer settings will be lost.
Reset Internet Explorer Settings
The other option is to enable the prompt in the Registry. Navigate to HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain and set DisplayTrustAlertDlg to 1.
Enable the IE ESC prompt Registry setting
Please let me know if you found another way to enable the IE ESC dialog box.