for months my dell inspiron 3520 has been completely freezing up, firefox has "stopped responding" and i get these error messages "youre pc has ran into a problem and needs to restart." sometimes it will loads to 100% and do it itself, but most of the time it just sits at 0% and i have to use the power button to turn it off. i have ran the disk cleanup, i've deleted useless apps and i'm not sure what else to do. can someone please help me before i pull my hair out?! thank you, soo much.