So if WINNT.SIF in your SOURCE/I386 folder has the product key in it and you have WINNT.SIF in your FIX folder without a product key, which one will hfslip use? The one in the FIX folder right? Which without a product key required him to manually enter the key on the side of the case. The wrong key. The case key will install windows but XP will want to go through activation and that key will not activate. With the key in SOURCE/I386/WINNT.SIF no activation is required. That was the mistake I made. Does this make sense?