1. You download a program that you cant delete.
   See example in this article here: Clicky

2. You want to customize your windows settings
   Example: you want a custom boot logo when you restart your computer these files are normally a .MUI file

3. Create custom themes make your Windows computer look like a mac or Windows XP look like Vista

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This is the standard way to take ownership of a file or folder

To take ownership and grant full control (or read write) permissions of files or folders in Windows Vista and Windows 7 / Windows 8, do these steps.

• In Windows Explorer window, locate the files or folders that you want to take ownership and grant or change full control or other access permissions.
• Right click on the file or directory, and then select Properties on the right click menu.
  
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This trick works in Windows 7, and Vista (I use it in Vista and it works Great )

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