On Windows 10, if I open the Environment Variables window directly through Windows Search, I can't edit the System Variables (buttons are disabled):

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However, opening it through Control Panel (Control Panel > System and Security > System > Advanced system settings > Environment Variables) enables editing:

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Maybe related: I recently editted some registry keys related to Users.

I'd like to be able to edit System Variables either way.

  • Invoke the editor directly with rundll32 sysdm.cpl,EditEnvironmentVariables – LotPings Sep 23 '18 at 9:33

The Start Menu item is specifically titled "Edit environment variables for your account", so that's what it lets you do. I suspect the difference is that it doesn't go through UAC, while the other Control Panel link does.

Use the Start Menu item "Edit the system environment variables" instead.

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