How do I boot from a USB CD drive? This is all I have in the ways of CD drives for my laptop, and I've accidentally locked the BIOS.

to unlock the bios...take out your memory stick...turn on your laptop.. then off it and put back your memory stick..

or you can take out your cmos batt also..but it's quite difficult to take out cmos batt..

to be safe go to the nearest service center of your laptop

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