Windows upgrade disc upgrade from win 7 , 8.1 to win 10.  upgrade  to win 10   from windows 7  or 8.1    your  operating system must already  be activated  before  upgrading  PLEASE NOTE : you may now have to purchase a separate win 10 key relating to the  version you have upgraded to , this can be done online  i.e digital product key  /amazon  etc   and you would usually  have 30 days to do this , some buyers have upgraded without needing a key as the disc has done it automatically so it is worth trying the disc first , it will still upgrade to 10 and still keep all your files  etc  .  I do not sell keys . works for all   versions   except   windows enterprise  editions   ,   run disc from  within  windows  for 32-bit laptops only