Removing nonexistent path variables automatically

Question

I've accumulated a lot of environment variables in my user and system Path. I'm sure some of them don't even exist anymore, so I'm going to check one by one. But is there an automatic way to do it?

Answer 1

There is no native Windows function to perform such a purge.

You would need to make a script which would:

• split the %PATH% as described in "How can I use a .bat file to remove specific tokens from the PATH environment variable?"
• build a string for each existing folder
• setx PATH=<new string>