To turn off the screen while keeping the PC running, use keyboard shortcut, adjust the power settings, change closing the lid settings or use free tools.

On Windows 11, you can connect your laptop to a Wi-Fi network using Taskbar, Settings, and even Command Prompt, and here's how.

If a program is running in the background on your Windows 11/10 PC & you can see it on Taskbar or Task Manager but is not visible on your desktop screen, see this post.