Press Ctrl + Alt + Delete and select Task Manager
In Task Manager, select the unresponsive app
Click End task
If Task Manager does not open, press Alt + F4 on the active window
If the whole PC is frozen, press and hold the power button until the computer turns off
Wait a few seconds, then press the power button again to restart
If needed, unplug the power cable or remove the battery on a laptop after powering off
Use Ctrl + Shift + Esc to open Task Manager directly
Use Win + X, then select Task Manager
If the system is still unresponsive, perform a hard reset by holding the power button