1. Running the windows repair as mentioned above will indeed add the AHL. Windows repair though will delete all of your settings and applications i.e. you need to reinstall all yours apps. You should also back up your data (as directed by Microsoft) cos it's not 100% failsafe.
2. Before swithing the drive to the new PC, start windows xp, run Sysprep, shut it down and then move the hard disk to other PC. You can download sysprep here: http://www.microsoft.com/downloads/d...displaylang=en
* For the Sysprep tool to function correctly, the Sysprep.exe file, the Setupcl.exe file, and the Sysprep.inf file must all be in the same folder. Then run Sysprep with -reseal parameter.
** be carefull though if your hard drive is sata you may need to install the sata controllers for the drive before you can boot! Check with your hard disk vendor.