Once your USB drive is configured and loaded with your required firmware image, follow this hardware deployment process: Power off the target Dell Wyse thin client.
As of this writing, the fastest route is: https://www.dell.com/support/home/en-us/drivers/driversdetails?driverid=XXXX (Replace XXXX with the latest driver ID). Always verify the file name starts with Wyse_USB_Imaging_Tool . download dell wyse usb imaging tool
Since you asked for the tool , but likely need the image: Once your USB drive is configured and loaded