To my surprise, Windows 7 runs extremely well on my machine. I mean really well. It's a Core i5-9400F, H310 mobo with 24GB DDR4 RAM and a 500GB NVMe SSD. Initially I just did this as a test, just for the fun of it and to check if it was possible... Now I want to continue using Win7 as my main OS for the next 7 days (no pun intended). I'm running the x64 Ultimate SKU in UEFI mode (no CSM), patched all the way until January 2020. Also installed Microsoft's Security Essentials which works just fine, and using Microsoft Edge 88 as my browser, which was pulled by Windows Update. I'm not in danger as long as I carefully watch which sites I visit, and as long as I don't click any questionable links, right?