HydroQuarintine :
it just happened reacently, my pc will freeze everything but the mouse were im forced to hard reset and every time it has happened i was ether converting a video or was downloading an update on steam
IF you could give us more details about your machine and the issue you're facing we might be able to help you solve it faster.
Are you somewhat familiar with PC software/tech ?
Are you running, Windows - Linux ?
Is it an old/new - laptop/PC machine that you're using ??
Have you installed any peripherals lately, like external Bluetooth, Webcams, Portabl Hard drives/Internal,Wireless mouse/keyboard etc.
Any detail will help us understand your situation.