windows net user add password with special characters

The command line to add a local windows user called “newuser” with the password “p&ssw^rd”

You try

net user newuser p&ssw^rd /ADD

Uh-oh – it fails!

C:\> net user newuser p&ssw^rd /ADD
The user name could not be found.

More help is available by typing NET HELPMSG 2221.

'sswrd' is not recognized as an internal or external command,
operable program or batch file.

If the password contains certain special characters – like an ampersand “&” or a caret “^”, the password will be garbled, broken, butchered.

One solution is to have it prompt for the password

net user newuser * /ADD

but if you are scripting, this isn’t really helpful.

No, you cannot use quotes.

The solution: All Ampersands must be escaped with a caret “^”, and all carets in the password must be similarly escaped.

UPDATE: turns out in more recent versions of windows, exclamation marks “!” must also be escape with two carets.
See here for a good list of how to escape things.
http://www.robvanderwoude.com/escapechars.php

So, to use the password p&ssw^rd in a command line, you would need to replace it with p^&ssw^^rd

net user newuser p^&ssw^^rd /ADD

This will do what you expect

Note that if you do not escape the carets, the command may succeed, but the password will be wrong.

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