problems even after using a correct password escpecially if it's an OEM machine (Dell, Toshiba, Asus, Acer and the rest of the name brands). If it is an OEM machine and the Windows was activated on another machine you probably will have issues. Also the drivers for components on the her machine have been installed and likely aren't the same ones as your machine.
So that being said if you have restore disks from your machine it will install an activated version of Windows on that hard drive.
I have a Hard Drive I got from my Sister that has her log in name on it but I can't get in because she forgot her password. What can I do to get in and change the password?