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2009-03-24 Changing system environment variables from the Windows command line

There are several ways to change global or user environment variables manually in Windows. Most are well known so I wont repeat them here (e.g. in Vista or Windows 7, Control Panel/User Accounts, Change my environment variables). However, sometimes you want to do this from a command (aka script or batch) file. This is not as straightforwards as it might seem. That’s because if you simply set the variable – e.