Hi,
See if this assists you:
- Turn on your VAIO computer and press the F2 key repeatedly until the VAIO logo disappears.
Enter a password if it has already been set.
The BIOS setup screen appears. If the screen does not appear, restart the computer and try again.
Other advice says to press F2 and hold.
Normally it gives you the information at Boot on what Key to press at the bottom of the screen momentarily.
It is called Setup or BIOS; look for either..
Cheers.