Was long and annoying, but everything is working fine for me now.

I still have all my files and programs from before the upgrade. To be clear, I did not do a fresh install either time. So the second time I chose the USB option in the Media Creation Tool. There are a couple of ways out there to open the Settings app in Windows 10. Try to access the Settings app from other places. So, make sure that your Windows 10 installation is up-to-date before jumping to other fixes. I'm sure the files are SOMEWHERE on my computer, but after messing around all day I wasn't going to look for them. Microsoft has been releasing fixes to address various Windows 10 issues, including the Settings app. At 100%, the whole thing just disappeared. The first time I chose to just upgrade without downloading it to a USB drive. See this video to fix, if Settings app not working in your Windows 10 and keeps crashing. I actually had to download it again TWICE. So you would just load your USB drive and click the Setup file. I booted from the USB, but since I already had Win 10 -kind of- installed it told me to take the USB out, reboot, and run the setup file from the USB from within Windows. Download the whole thing over again onto a USB drive, and go through the entire install process again. downloads considerably slower than Windows Update did) is to download the Media Creation Tool from. Another option that worked for me (after all day.

Windows 10 settings app crash fix