299840How to use Sysprep with Windows Product. Windows 7 Forums is the largest help and support community, providing friendly help and advice for Microsoft Windows 7 Computers such as Dell, HP, Acer, Asus or a custom build. During Windows 7 sysprep, the procedure stops with the message " A fatal error occurred while trying to sysprep the machine". I am trying to sysprep a Dell Precision Workstation T7400 with Windows 7 Professional 64- bit. But I keep getting a Fatal Error when i try to sysprep the system. Im trying to sysprep Windows 7 Enterprise 64 Bit with a " Standard Build" image ( An image with all basic all- round software that ever. | 22 replies | Windows 7. Hi guys, I need to swipe a single HD between two different computers, but when I try to Sysprep. exe, I got a " fatal error" message, looking in the logs, I found this: Setupact: Setuperr: This Windows eetings! Here is how I run Sysprep with ProfileCopy set to true: - network cable unplugged - profile settings that mainly are in Control Panel, nothing is done with apps - turn off Tile Data Model