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. In the Registry Editor, go to this path: HKEY _ CURRENT _ USER\SOFTWARE\Policies\Microsoft\Windows\Explorer and modify the disable notifications value from 1 to 0.
