Look through my thread in this forum for some things. It can use a update if someone is interesting helping to update the thread with new and changed info. As for windows just go through the settings in the UWP app as theirs a few hidden things in there like start suggestions and a couple others to turn off. Try out the latest stuff mixed reality viewer etc. As stated newer systems aren't supported on older os's obviously so good you went Win 10. You don't need a Microsoft account as such unless you want connectivity, you can have local and link apps to the account separately which is what I do. Also for those that upgraded do a disk cleanup if you want I saved 20GB each device doing so my 2 in 1 only had 9.8gb free after the update now about 20GB free etc.