I was facing this problem from four months. I was not getting any update and WPCentral was the only source to get information about updates. The biggest problem was that the updates to system settings have no link in store so there was no way to get them updated. I searched a lot, I have tried the few solutions given on different sites but none of them solved the problem. Today I tried something devised by my self and luckily it worked. The steps are:
1- Make a list of all the apps installed in the phone (other than inbuilt apps) this list is also there on "https://www.windowsphone.com/en-us/my/purchase-history" associated with your Microsoft account.
2- Uninstall all the apps (other than inbuilt apps)
3- unpin store icon from start screen
4- delete Internet Explorer history (Internet Explorer->settings->delete history)
5- soft reset your phone (press and hold power button + volume down button for 10 sec) . Soft reset does not delete any thing from the phone.
6- adjust phone's date and time
7- pin store tile to start screen
8- Install necessary apps
After performing these steps I got store tile with number 6 on it. I opened the store, there were six updates available 3 games, access point, display and Transfer my Data got updated.
I think there are some apps which disturbs the OS app update mechanism. I hope Microsoft will be working on this issue.