Ok I installed Windows on my brand new iMac and had no problems at all until I got to the Authentication part. Windows was setting up and I had to enter the 25 digit COA. This was fine, except that my windows packaging said that the COA was removed by the pc manufacturer. (?) I found the the barcode on the outside that said COA then a bunch of numbers, problem is that it is only 14 numbers not 25. Now I cannot get the cd out of my mac, and whenever I turn it on it goes into windows setup again. I don't evencare if windows is on there any more, I just want to get back to OSX and delete the partition. Any Help guys? Also I got the windows from newegg, its an oem version which I was assured would work, please help.