hello guys i have a laptop ACER D5742G about a year old now, my problem is i reformatted it because i think it has a virus but after i reformat ibluescreen of death appears i check the bios all of hardware appears good hdd,dvd,memory, videocard, so i reformat it again but the problem occurs again., guy what do you think the main cause of these? sorry for poor explanation i hope you will understand it thanks in advance