Ctrl-F11 should be pressed early in the boot process to boot into the recovery partition. That should work as long as there is a bootable recovery partition present.
F8 should be pressed somewhat later to boot into other than normal modes of Windows Vista. That should work if there's a somewhat running Windows on your PC.
That's about all that can be said based on what you tell.
Bonjour ! Since I have my Laptop ( Dell Inspiron 1720 > Windows Vista Professionel ) I always had problems but I always found a solution ( System Restore, etc ). Currently I have no more option " Dell Factory Image Restore " ( F8 Or Ctrl + F11 ) Somebody can Help Me ? I'm not an Expert ! Many Thanks to All from Belgium ...