I am using a Micromax P362 tablet with Android 4.1 Jelly bean (rooted). This problem occurred a month ago. The app named "Android System" appeared in the 'Downloaded' section of apps. Yet it is not seen in any other app managers (such as Link2SD). When I press in uninstall updates, the app just disappears and all apps hang periodically until I restart tablet. Now the problem is that 'Share via' option is not working and even factory reset option is not working. So, how to make Android system app function normally?
Any help is appreciated