Installed Windows 7 with mild problems

First I installed Windows and then wanted to activate the key. The Key has not been accepted and I have researched. At first I thought I had the same problem as other users who wrote bad recessions. Then I continued to try and found that I need to activate the product by telephone. There was unfortunately no description that the product can not be installed as in the normal way, so there was a misunderstanding and a huge shock that I acquired an expired product.

Point deduction, because there is no proper description was included and it is Dell Reinstallationssoftware. Otherwise, I have a fully-functioning software (Although I now always have a "Dell" branding, mentioned nothing of the advance).