I cant access the bios for my friends sony vaio vgn-nr38m im trying to boot from cd to install windows 7 on turn on there is a vaio logo and then a black screen with a blinking underscore and then then windows vista loads no bios key is displayed and ive spent a fair while trying all the function. Bios sony vaio windows vista. Sony vaio laptop factory restore reinstall windows (reset vgn sve svd vpc ultrabook duo t13 e series - duration: 6:35 rubberwilbur 1,203,041 views.