My Computer Locks Up and Won't Boot. What Do I Do? - Ask Leo!
Windows completely broken and now laptop screen won't turn on but the fans spin and the caps lock blinks once during boot up and the power button lights up : r/Lenovo
Is your PC not responding, hanging, freezing, or locking up? If Windows stops responding to mouse and keyboard input, nothing moves on the display or... | By HP Support | Facebook
Remove "Your Computer Has Been Locked" Pop-up Scam
12.04 - System freezing at visual artifacts screen - Ask Ubuntu