The new window will show the available restore points.Right-click Start > Run and type localappdata%\Microsoft\Windows.However, you can rename the usrclass.dat file, and restart your computer to restore it, and then rename the file so that all things including the Action Center will work as default. If you delete the UsrClass file from the system, some things like the search and desktop options, Start menu, sound button, and calendar won’t work. Plus, the usrclass.dat file stores remote and local folders, ZIP files, virtual folders, and Windows special folders. The ShellBag consists of registry keys (with regards to Windows Explorer) that contain details about a folder such as the size, icon, and position, to help identify user activity. DAT file that stores the ShellBag information for the desktop. Restart your PC and check if the Action Center appears and that you can open it.
