Calling Custom Batcjh File

Hey,

I got a batch file off the internet a good few years ago that allowed me to quickly open applications or folders. Basically, I add a shortcut to the application or folder in another folder, which also contains a batch file, named m in this case. Then, my simply pressing win+R and for example typing "m c" it would call the batch file which would open the shortcut called c (chrome for example). It was a very handy script.

Anyway, I have the script, I just can't recall how to add it to windows so that it calls the batch file when I type m into the run command. I tried adding it to the Path variable in environmental variables, but it just says Access Denied.

Do you know where I would need to set this? Thanks.

For anybody interested, this is the batch file.

@echo off
if "%1" == "" goto error
:again
if "%1" == "" goto end
start %1
shift
goto again
:error
:end
exit