this error is produced on both upgrade from AU and clean install from ISO, no programs installed. Tested on 5 different PC setups all produce the same issue. They are not old systems, they are all systems that are less than a year old and all are top end spec'd machines. As I said before and I will say it again this build should of not passed MS's own internal rings. Yes I have provided feedback to MS on this matter. Yes problems and bugs are to be expected for sure. But having the problem be the whole settings app is not a small issue, not being able to use the app to roll back, not being able to use the settings app to verify your account, not being able to set dpi or actually use anything in the settings app other than windows update is a major bug that should have been picked up in the internal rings before being releases to the fast ring. Now I'm a very experienced beta tester all the way back to windows 95 and can deal with this and and roll back via other methods, there are many on the insider program that can not figure this out and really shouldn't have to deal with a bug like this to say the truth.