Hi all, hope this is in the right place. My pc tower has become almost unusable running Win7. Its slow and freezes/hangs, I tried to upgrade free to 10 when the offer was on from Microsoft but they said my licence number wouldn't allow it to install. Its a legit number used by computer shops when selling so called refurbed computers. I am running Linux Mint alongside Win7 and its going like a train but I cant install my Epson printer. I have tried Linux over these last few years but its a bit nerdy for me and I don't understand a lot of things on it. I see on Ebay lots of Win10 downloads/discs/keys for sale from cheap up to around £100 from Microsoft. What is the cheapest way of upgrading to 10 with a legit key. Thanks john.