Double-click on Restoration.exe and the program will open up. In the [B]Drives [/B] box, click the drop-down arrow and select the drive that had the missing .dll (you may need to go to My Computer first to find the correct drive).
In the empty box below that, type in [B]hal.dll[/B] and then click [B]Search Deleted Files[/B].
With any luck, it will find the deleted file. If it does, click on it to highlight it, and then click on [B]Restore by Copying[/B].
Navigate to the folder it should go back into. Note: it will not be on the "[B]C[/B]" drive since it's in another computer, it will be on whatever drive your slave is showing as, like [B]f:\WINDOWS\system32[/B].
If all this has gone correctly, put the drive back into the original computer and see if it will boot up.