I am trying to run the command %windir% in a command prompt, but I am getting an below error:

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    Short answer: %windir% isn't a command. Its just a Windows built-in environment variable. %windir% contains the path where your Windows directory resides in. Likewise, %homedrive% contains the drive that windows is installed in. – Don't Root here plz... Sep 10 '16 at 13:40
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    The real question is: Why were you trying to 'run %windir%? What did you think would happen? – underscore_d Sep 10 '16 at 19:52

Strangely enough, no one has explained the entire story, i.e. the error.

Indeed %windir% is an variable, and its contents on your system are C:\Windows.
So when you 'execute' %windir% its contents are substituted and your command is C:\Windows, which, as Windows informs you is not recognized as an internal or external command, operable program or batch file.

A fun experiment would be to place an executable named windows.exe in your C:\ root ;-)

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  • For the fun experiment (which works as expected) +1 – DavidPostill Sep 11 '16 at 11:22
  • windows.com, windows.vbs, windows.bat... also works – phuclv Nov 24 '17 at 13:24

%windir% is a variable and should be used in conjunction with standard commands or actions.

For example CD %WINDIR% will take you to the windows directory...

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You must be used to a different shell (in particular 4DOS/4NT/TakeCommand) where a directory name is treated as a command to change to that directory. That’s not the case with CMD, and you have to use CD before it (if it is already on the same drive. I don’t know if CMD has cdd command to change drive and directory).

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    no cdd, just add /d – Uberfuzzy Sep 10 '16 at 16:18

when you do %windir% you are meant to use it with other commands with it. so that is why there is an error. for example if you do cd %windir%, you will not get an error

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