Hi, I've been purchasing products from amazon.com for so many years, and they worked well must of them but this product in particular KENSINGTON 64058 PC KEY USB SECURITY DEVICE it just doesn't work. I contacted the manufacturer company regarding troubleshoot and I've been told that product is discontinued it is not for sale anymore and as far as they know nobody has the same kind of product on the market, I have also been trying to get reinbursed for the last 2 weeks I called the company myselfand they promised to send me a return label buy I havent had any good luck.