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I read that "TrustedInstaller" is the new root account in Windows 8, when it was previously "SYSTEM". The SYSTEM account still exists, but it's not the highest level admin account anymore. While I can find information about how to open a SYSTEM command prompt, however, I can't find anything about opening a TrustedInstaller command prompt. How can I do this?

In case anyone is wondering why I am interested in this, besides simply wanting to know how to get the highest access on my computer, I am also interested in modifying files in the C:\Program Files\WindowsApps folder (where Windows Store apps are installed) and even if I take ownership of the folder or use a SYSTEM command prompt it still says access denied for some reason. And I don't think the files are in use.

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