How To Add/Edit Environment Variables in Windows 7


If you are a geek who has experience in Linux, you would know exactly what I’m talking about. If not, Environment Variables are a set of predefined variables that make system functional properly. The same also applies to Windows, though, as a regular user, you don’t need to worry about them.

Recently, I was looking at some Android documentation and trying to set up a development environment on my Windows 7. One of the steps is to add a directory path to the PATH environment variable. I had to admit that Google didn’t put much effort into the documentation to make us go through it easily.

To install the SDK, simply unpack the starter package to a safe location and then add the location to your PATH.

No explanation on how to do this.

So how exactly are you going to do this?

To add or edit anything environment variables in Windows 7, you need to go to System Properties first.


Then, go to “Advanced system settings”,


Under “Advanced” tab, click on “Environment Variables …” button at the bottom.


Double click PATH and add new path into the “variable value”. Make sure you separate the value with “; “


Let’s sum up what we just did

PATH is an environment variable that holds all the executable shell commands. When you type something in the command prompt, it will go through all the path and search for the match of the command line utility name you have just entered.

In short, there are tons other environment variables in Windows, if you are interested in how it works, you can go to Technet documentation and check out.


  1. For complete novice – these instructions should probably include that to get to System Properties under Windows 7 and higher, you right-click on “computer” or “my computer” and select properties.

    • Press (START) focus should be on search box: Type “regedit” your PC will find the app for you, also works quick for CMD or any other app that you want to find fast.

  2. Hello, Johnatan!

    I have a question: do I need to restart the computer after changing an environmental variable’s value?
    Because sometimes, after changing it, the programs using these values don’t recognize the change.


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