Acer aspire 4530 manual

While I could not find the answer to your specific question, I was able to find the actual instruction manual for the acer aspire 4530, which only mentions how to enable password protected hard drive encryption, etc.

Here is the manual if you need it:

http://www.megaupload.com/?d=SRSD266L

easiest way, pull the CMOS battery to reset the BIOS, it will reset the start up password to off. There really isnt a need for one if you just password protect the OS accounts.