Windows 7 is much better at being transplanted to another computer than Windows XP, but often on dissimilar hardware it will cause the computer to freeze. You need to install Windows from the installation disk or from the recovery partition or recovery DVD's
I don't understand what you are doing, are you reinstalling Windows with an installation disk? If so the error message you are getting would indicate that you are having memory problems. This could be caused by faulty memory or a bad power supply.