yesterday my pc was fine but today it would boot show the ms logo and while coming to display the user accounts it just shuts off and restarts again it doesnt display the ac on screen btw. so i tried to reinstall xp so got a copy (iso) from net and created a bootable usb through rufus and and selected f11 as it displayed select boot order in the screen which had my usb and i selected that it shows press any to continue and then disk read error ctr alt del to restart and same thing happens again and i tried different iso and different s/w power iso. using poweriso a cursor keeps blinking and windows restarts nothing happens......help me