Hi @GC67, 
You’re not doing anything wrong. The reason tasksel won’t launch is because it depends on systemd, and WSL doesn’t use systemd by default. That means tools like tasksel that rely on system services simply won’t work inside that environment.
If you’re trying to get a GUI working, you can install a desktop environment manually instead. For example, you can install XFCE with:
sudo apt update
sudo apt install xfce4
Then use an X server on Windows like VcXsrv or X410 to display it.
If you’re on Windows 11, it’s even easier since WSLg already supports GUI apps natively. You can just install something like xed or gnome-terminal and it’ll open in its own window.
So yeah, you don’t really need tasksel in WSL. It’s more useful on a regular Linux install that boots with systemd. If you let us know whether you’re on Windows 10 or 11 and…
we can help fine-tune the steps from there.