I put the original two chips back in to see if that would fix everything and it just hung on the windows loading page. After 10 minutes, I turned it off and put the two new chips back in, in the order that was working a few minutes ago (at least, it was working in the sense that I could get into windows) But that didn't work this time and now I'm back to that original screen that started this whole mess asking me if I want to load windows in normal or safe mode - and any mode I choose just reboots and brings me back to the same page.