So I was using windows 8.1 up until I did the free windows 10 upgrade. Recently I did a full comp reset and reinstalled everything to include fresh windows using my 8.1 disc. After doing that I am no longer eligible for my windows 10 update, does anyone know if there is anyway to contact windows and see if I can get it back? I'm sure they can look up my windows code and confirm that I did indeed take advantage of the free upgrade with it.