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I am using a dell 1464 laptop. If I disable "USB Legacy support or USB keyboard support in BIOS and the keyboard of my lap," how can I press F2 to go to the BIOS setup menu and F12 for boot menu devices (if I want to access the BIOS setup and boot menu). NoSafeMode is software not allow access...

I want to lock the F8 key on the windows7,not allow safemode access. Who know would only help. Thanks (google translate for me ):(