F12 Developer Toolbar is missing from IE9 menu

Strange thing happens to my IE9 after I upgraded my OS to Windows 7. I cannot find the "F12 Developer Toolbar" menu.

After a few minutes search in the Google, I found my answer. If this problem happen to you, you have to change Internet explorer setting in "Local Group Policy" of your computer. Here is how to do:

1. Type gpedit.msc in run box and click ok. This will open up "Local Group Policy Editor"

2. In the left panel click on User Configuration > Administrative Template > Window Components > Internet Explorer > Toolbars >

3. In the right panel, you will see the "Turn Off Developer Tools" settings. Double click on this and change the value to "Disabled" .

4. Restart the IE9 and you will see the "F12 Developer Tools" menu just like me :D. Enjoy.