Hi, i built my computer a little while back and right now I am having issues with windows, It is currently not allowing me to factory reset among other things, and the only way way I know how to fix this is by completely wiping my hard drive and reinstalling windows 10, but the problem is I had moved a while back, and my case with the cd key on it was either lost, or thrown away (most likely thrown away). So I was wondering if there is anyway to get your cd key back after losing it, because I really dont want to buy a whole new key for this simple fix.