Domain/Bios Help

Hi,,
I recently bought an 4 old laptops Acer extenza 5630z running windows xp from an auction house It was old school stock...however when I try to log on it still comes up with the domain SCHOOL and asks for user name and password...which I dont know obviously...and there are no reboot discs, I tried downloading a password reset program to a USB Stick and CD but it doesnt recognize the drive...so wont read the program...tried booting to safe mode then command prompt but it ignores that and boots to log in again ...tried pressing F2 going to bios but phoenix set up then asks for password which I dont know.....tried dismantling and taking CMOS battery out to kill bios memory but when I put it back in and reassemble it it still asks for phoenix password...
Question :-.
If I put a new hard drive in will this get round the domain password???

My original idea was to upgrade operating system, hard drive and memory and sell on. but cant get passed Domain and Bios password.

Anyone got any ideas or have I bought a load of junk..

Any help much appreciated.
...
FIRECOX

Bad practice on the school, leaving data on there. Yes might only be someone's homework but it isn't good.

Yes installing new drive would allow you to install a OS but if you can't change the boot order you might not be able to boot from CD.

However if they have only changed the boot order to boot from HDD 1st and still left other devices enabled you might be lucky. To test this remove the HDD and see it boots from the USB CD.

To reset the password in BIOS try https://www.google.co.uk/search?q=A...me..69i57j0.6775j0j4&sourceid=chrome&ie=UTF-8

Have they got lic keys on? If so just F + R manually. Bad that they've left their data on there though.