Good morning. Long story short...... I bought a retail copy of W7 then upgraded it with the cheap offer for W8 when it came out via MS and subsequently again with the free W10 pro upgrade offer. I can't get the same motherboard now as it's too old (still fine for my needs though and seeing as I bought 16gb of DDR3 last month I stuffed if I'm spending almost £400 on DDR4 kit at the moment) and the replacement will obviously change the HW ID's thus from what I gather rendering my activation dead. I have looked at the activation methods in these forums and will go down one of those routes if needed but want to know if anyone thinks it's worth a call to MS when my PC is back together and playing the whole I bought a retail copy blah blah to see if they will activate W10 on the new board. Many thanks.