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Install Upgrade - Product Key Not Valid


I am a graduate student at at univ. Of maryland, college park. Until around a month ago, i was using windows vista, but it kept giving me problems and viruses. So, i decided to switch to windows 7. The windows 7 cd is available at subsidized rates for staff members at the university. Since i am a teaching assistant, i could avail of this discount. Although i had asked for the upgrade cd, when i was installing windows 7, the cd asked me whether i wanted to upgrade an existing os or install a fresh copy.

I was not aware that the upgrade cd cannot be used for fresh install. I thought that if the upgrade cd cannot be used for a fresh install, then the cd would not give me the option of a fresh install. But since it did give the option, i decided to erase the windows vista files and install windows 7 afresh, since windows vista was giving problems. So, i installed windows 7 ultimate afresh, and i was asked to activate it. Its been about a month, and when i try to activate it, it says that the product key is not valid (that is, it can only be used for upgrade) and hence i am not using a legal windows copy.

But i was not told that the cd can not be used for fresh install while installing, and was given an option to either upgrade or install afresh, which resulted in me deleting my original windows vista files. I immediately contacted the university it helpdesk, but they do not have the fresh windows 7/vista cds for graduate students, they only have update cds, and advised me to contact microsoft. What should i do now? Can i get a new product key?


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