IE 11 Missing F12 Developer Tools

the F12 Developer Tools windows is empty on my machine.

I've tried the following solutions, but nothing worked

https://stackoverflow.com/questions/960683/why-isnt-my-ie8-developer-tools-working

http://www.davidtong.me/ie8-developer-tools-wont-open/

http://www.sevenforums.com/tutorials/152554-internet-explorer-f12-developer-tools-enable-disable.html

It looks like the 'shell' part of F12 is loading, but the tools themselves aren't loading. Is there anything on your system that would impact loading a browser control from resources in a dll (specifically the F12Resources.dll). For example do you have any virus scanners or settings that block the res:// protocol? Do you see anything in the event log?

Issue is due to the Update Versions: RTM (KB2841134).

Refer the issue on Microsoft Feedback

Best way to fix is to update the Internet Explorer 11 to the Latest Knowledge Base (KB) update

However, you can update from the below location

Control Panel\System and Security\Windows Update

Install required Important Updates and Optional Updates

According to your picture, that's not the latest version of IE11 for Windows 7.

Update to the latest version and if that doesn't help, uninstall IE11 and reinstall it (using the latest version).

You may also want to run a sfc /scannow if you haven't already, to ensure system files are in place and not corrupted.

I don't know what the problem is, but I just remark that every new version of IE destroys development tools in some way, later fixed via Windows Update.

If no one else comes up with a solution to the problem, and if you do not want to wait for Microsoft for a fix, I can offer as a temporary workaround using Firebug Lite. The Lite version is pure JavaScript, but the non-Lite version is only available as an extension of Firefox.

See this video for installing it : Installing Firebug Lite on Internet Explorer.

Click on

System Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Toolbars

A new window will open with the Toolbar options.
Open "Turn off developer options" and in the new window choose "DISABLED".