An unknown password was put into the administrator bios account. Unable to access the bios, HP says that they have to change the motherboard. I know that I use only two passwords for my computers, neither is the one that is in the bios. There is also a user in the bios. The tech support at hp told me to take out the RTC battery, which I did, now it's even worse, no wifi and no bluetooth. Would be reall greatful if someone has a solution to this problem. Normally you just clear the cmos and everything is back to normal. I'm sure a motherboard change (after 2 months) is pretty costly.