I ordered product from Amazon. It came in a sealed package. I installed software and when inputting activation code, I was told this has already been used. How could somebody have used the code which came a sealed package. I have emailed Winzip help line and provided all proof of purchase and all I got is a reply in a foreign language and I am still stuck with a product that I cannot use. I think Amazon should be vetting his suppliers before unleashing them on innocent customers.