I have Windows 10 Insider Preview build 10074, and when I try to personalize, (Right click desktop screen > Personalize) It won't open. It brings up an error message [X]. The error message says this:
(X) This file does not have a program associated with it for performing this action. Please install a program or, if one is already installed, create an association in the Default Programs control panel. The same thing happens with Display Settings. Also, I con't open the start menu.
Then when I created a file fr testing (named 1000.100ds342) because I knew that the file extension wouldn't work, it said Look for an App in The app Store
I clicked it, and it said ms-windows-store:Assoc?fileext=100ds342
File system error (-2018374635)