To disable UAC on Windows 8.1 or Windows Server 2012 R2:
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- On Windows 8.1, go to the Search Charm and type Change User Account Control settings.
- On Windows 2012 R2, on the Control Panel, select User Accounts, and click on Change User Account Control Settings.
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In the User Account Control Settings console, move the slider to Never Notify.
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Click OK.
You may see a prompt to confirm your selection or to enter an administrator password.
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Reboot the machine to have this change take effect.