HP for the most part is fine with BIOS defaults.
by R. Proffitt - 10/31/12 5:55 PM
In Reply to: Reset BIOS, now computer is very VERY slow, help please by ZLanphere
But I can't tell if you loaded those after the reset.
It's possible you need to change the HDD "mode" but this is something the owner should know.
And a few more things. No to bios updates. Those are free at hp.com and again, unplug USB devices for a test boot.