Sometimes you may notice your Windows personal computer freezing or in stubborn hibernation. Windows has a hidden keyboard shortcut that can help restart video drivers in case of such an occurrence. You might need four fingers though!
However, this does not work on Windows 7, so hopefully, you have already upgraded to Windows 8 or Windows 10. The shortcut will cause a beep to sound and quickly restart NVIDIA, Intel, and AMD graphics. If this trick doesn't work after all, just do a hard shutdown by holding the power button for about 10 seconds. Thanks to the chatroom for relaying this key combination!