My friend works for a company and he got a copy of Windows 7 Ultimate from some tech day that he visited at some place. So he gave that to me and I installed it on my machine cleanly. Now after booting it up I was shocked to notice that in the right side corner of the desktop on the machine there was a message called "This copy of Windows is not Genuine". Well, if he got this from a tech company then it should be a legal version of Windows, isnt it? What can I do to solve this issue now?