Hi, my screen freezes and crash. Once i try to reboot, a blank screen appears which asks me to chooose a reboot sevice and press any key. My computer crashes a few times every 15 mins. Please help. Right now i have tried to update the windows 10. And problem still presisted. I downgraded back to windows 8.1 and its not wokring well neither. As i try to upgrade back to 10. An error presists. Please help with the problem i am having right now as i have an assignment to complete. Thank you in advance for your support. i am currently on mobile. Not able to upload any image for problem resolving convenience.