I am planning to purchase an OEM version of Windows 7 in a few weeks and wanted to know if I would get an authentic and most importantly sealed copy. I have purchased a copy of Kaspersky anti-virus on amazon.com about 2 years back and it was a no good copy. I did not work when I tried to install it. I gave it away and the person I gave it to said it was also a no good copy. Ever since that incident, I have purchased software directly from the company. Like Norton 360 I had about a year ago, I purchased from Symantec directly. Even though I had to pay full price from it, I was assured that it was an authentic copy.