The menu bar of Visual Studio 2010 doesn't display

I upgraded from VS 2008 to VS 2010 but the menu bar has not displayed. That only displays when I press the "Alt" key. I refered the question in following link: Missing Menu Bar in Visual Studio 2010 and performed as follows the instructions but no success.

Does anybo开发者_如何学编程dy give me some instructions?

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VS 2010 RTM out of the box does not have a feature to hide the main menu. There is an extension that hides the menu bar; did you install that? If so, uninstalling it from the extension manager will restore the default behavior.