Windows paths issue

[snippsat]

You don't give full path when shall close the process.
It's only name vlc.exe or PID.
Don't need "\" before the path.

import subprocess

subprocess.Popen([r"C:\Program Files\VideoLAN\VLC\vlc.exe"])

Kill💀

import subprocess

process = subprocess.run("taskkill /im vlc.exe", capture_output=True, encoding='utf-8')
print(process.stdout)

Output:
SUCCESS: Sent termination signal to the process "vlc.exe" with PID 21356.