Tue 13 May 2008
%SystemRoot% is a system wide variable which refers to the path and folder name where system files are located. Typically this is C:\Windows, although you can designate a different drive or folder when windows is installed. you can use %SystemRoot% in place of the actual location of the folder that contains the windows system files.
For example, to identify your system root folder, click Start -> Run, type %SystemRoot% and click OK. This will open windows explorer with your system root folder displayed.
Confusingly if you go Start -> Control Panel -> System -> Advanced tab -> Environment Variables, then scroll to the bottom of the list and double click windir you will see that %SystemRoot% is actually a “Variable value” of a variable named windir. (see image below)
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