i picked up an emachine T2895 w/xp on it, off the curb.got it home and booted it up only to find it needs a password. while it is booting up it does not respond to F2 for set up. a friend said take the cmos battery out and i'd be able to go to setup and change password.that did get me to set up, but tried it 100 times.goes thru process but doesnt work. can some one help?