Can't access the BIOS

Generally a good machine; runs well and I haven't had any major issues. That said, the BIOS menu is not available by any of the usual tricks (pressing ESC, F keys, DEL, or even WIN B at start-up). I've tried to talk to HP, and they refuse to give support for the machine when it's out of warranty. Two-star rating is for the abysmal customer support.

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