I am very glad and happy to write it. I have heard a lots of people nowadays ask on How to enable hidden window 7 themes For them I am posting this tips. I hope you will really enjoy it... Follow the below steps for do this.
1. First You Go to Control Panel.
2. Then Click on Folder Options.
3.Now Click On the View tab.
4.Now uncheck the box Hide protected operating system files (Recommended).
5.It will show you a warning.Click Yes.
6.Now Goto C:\Windows\Globalization\MCT\
7.Inside this folder you will see folders with name MCT-XXwhere XX will be AU,CA etc.These are the country codes in which these themes are automatically available.
8.Inside each MCT-XX you will see a Theme folder.Open it and click on the .theme file to unlock it.
9.Once unlocked the theme will be available to you in personalization option.
METHOD 2:-This is a simple method as compared to the above method
2.Copy and Paste the following code into it.
Windows Registry Editor Version 5.00
3.Save it with the name allregional.reg
4.Now double click on it.It will ask for your permission to add the file to registry.Click on Yes.
5.Right click on desktop and select personolize.You new themes will be available to you.