The blue screen show out too fast...when the time i want see then it automatically off.i can enter BIOS...because when the time i almost finished change to window 7,it suddenly show out the blue screen then installation failed and then safe mode or startup normally also not used..this recently the anitivirus got problem and unable to uninstall....when time want uninstall,i will not responding and when the time shut down also need at least 30min to shut down