I was going to say the same thing as UP Man. Save your sales receipt and if there is a prooblem then you can deal with it. I believe whne you register a product it is just a way for a company to get your mailing information and other demographics. Enjoy the scanner.
Registering your scanner does not in any way give you a warranty (nor does not registering it take away a warranty). Purchasing the scanner gives you a warranty, and keeping your receipt ensures you will receive warranty service during the full warranty period.