Wiping the hard drive has nothing to do with the system BIOS. BIOS is a chip on the MB. Not sure what an Acer Aspire One is, notebook or desktop. Reset the CMOS and default the BIOs if desktop. Remove the battery for a few minutes if a laptop.
------------------------------"To better understand why you need a personal computer, let's take a look at the pathetic mess you call your life."
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