Long story short, upgraded my CPU and consequentially my MB (New socket) and although it's posting fine and is going into the BIOS just fine it will only see a left-over ubuntu install and a windows boot manager (On the same HDD). It also sees my USB Drive with the newest Windows 10 ISO. The BIOS shows all components and all drives working, and I've read somewhere that Windows doesn't like MB swaps, what can I do? I don't want to lose any data. P3 is what my C: drive used to be.