HP 550 CMOS BATTERY

If this is the security password it will be fairly robust -- probably in flash memory which doesn't need a battery to support it. So rather than tear the laptop apart, make a call to HP and be prepared to produce evidence of purchase.

i removed cmos battery still doesnt acept the password

the password isnt writeable

can you tell me how can i disable sata native mode in win7

to install windows xp