Q:

Windows 8.1 RT keep searching for update after installation of KB2919355 April 2014 Update 1

I have a tablet that run Windows 8.1 RT. I did a restore few days ago then I started do the updates availables in Windows Update. After a few Update/Reboot cycles, KB 2919355 April 2014 Update 1 was installed and now Windows Update keep searching for update forever. I've tried everything I found on the net to fix this (Windows Update Troubleshooter, stop the service / delete c:\Windows\SoftwareDistribution folder, etc.) but I can get this fixed. 
I found two similar posts for Windows 8.1 with accepted answer that suggest to install KB3102812:

Cannot install any updates on clean Windows 8.1
https://answers.microsoft.com/en-us/windows/forum/windows8_1-update/windows-81-windows-update-stuck-at-checking-for/c0d42129-7479-44cb-a150-a95ad707ab2b

However, the tablet run Windows RT and KB3102812 page (https://support.microsoft.com/en-us/kb/3102812) state that :

The update for Windows RT 8.1 can be got only from Windows Update.

The update is also not available on the Windows Update Catalog for ARM architecture.
Does anyone has a suggestion to fix this Windows Update issue or any hint where I could go to download the KB3102812 for RT?
EDIT
I now know from Microsoft Support that installing KB3138615 should fix the issue but I still can't find a link to manually download this update for ARM devices.

A:

You can download the update kb3138615, which includes the latest Windows Update Agent, from this link. Also stop Windows Update service like in Windows 7 to avoid the hang at "Searching for updates on this computer" while trying to install the MSU.

