Press Win + Ctrl + Shift + B . This shortcut forces Windows to refresh the display driver, which can often "unblock" a screen that has gone black or frozen.
Sometimes your computer isn’t truly blocked—it’s just overwhelmed. If you see the spinning wheel or hourglass, give it 30–60 seconds. Modern systems often finish whatever background task is hogging resources. If it snaps back, you’re done. how to unblock your computer
If waiting fails, try these keys in order: Press Win + Ctrl + Shift + B