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Make sure to have to your PowerShell ExecutionPolicy set to Unrestricted or to launch it with Bypass. This can be done using Set-ExecutionPolicy Unrestricted
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Run PowerShell as Administrator
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Reach the directory with Set-Location or CD
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Simply type out the name of the ps1 file and press Tab.
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Follow the instructions on screen.
IMPORTANT NOTE
Make sure to read the elements that will be modified carefully, I am not responsible for any loss of functionalities of your OS or any other issue. Most of them also have an "how-to" revert those changes within the script.
Use at your own discretion.