no no. the script is running then I can’t stop it since it’s on startup. im looking for a command to kill or stop the process
Unless you have changed things, or are not using Raspbian, the login name is pi and the password is raspberry.
Not on Windows, but you can do it with Linux. If you don't have a Linux PC you could boot most PCs from a Linux Live USB stick, or put another copy of Raspbian on a spare SD card and use your Pi.