And Beta versions also expires after few days of final release , afterwards you can not install it on your computer.Sarkar said:You can activate win 7 or earlier for life time(install all update and service packs) but cannot activate Win 8 for lifetime. What you can do with windows 8 is to make it 180 days of trial after that reset trial and so on. So day by day they are making it very difficult to activate pirated copy of Windows. :s
I am sure Win 10 will be the hardest as it is their last windows.
So the only option left with us is to join as a beta tester for their upcoming builds