windows 8.1 store error 0x80070078

terimade,

This Microsoft Answers thread provides several different methods of resolving your issue, some of which include:

Method 1: Check the System Date and Time

Let’s first check if the system date and time are correct. If they are showing incorrect values, then refer to the article “Sign in problems caused by incorrect time” and follow the instructions to set the correct date and time from this link:

http://windows.microsoft.com/en-US/windows-8/clock-out-of-sync

If the above steps did not work, then try the next method to run the App Troubleshooter and check if that works.

Method 2: Run the Apps Troubleshooter

Let’s run the Apps Troubleshooter and check if that helps. The Apps Troubleshooter is an automated tool which we have developed to address a number of known issues that can prevent the Apps from running properly. This troubleshooter automatically fixes some issues, including suboptimal screen resolution, incorrect security or account settings etc. You can click on this link to download and run the Apps troubleshooter.

http://download.microsoft.com/download/F/2/4/F24D0C03-4181-4E5B-A23B-5C3A6B5974E3/apps.diagcab

I would also suggest you to click on the below given link and to refer to the article: “What to do if you have problems with an app” for more information on how to fix the common issues with the Windows 8 Apps.

http://windows.microsoft.com/en-US/windows-8/what-troubleshoot-problems-app

If the troubleshooter was not able to find and fix the issue, then let’s clear the Store Cache and check if that helps.

Method 3: Clear the Store cache

You may try these steps to clear the Store cache and check if it helps:

a) Press the “Windows Logo” + “R” keys on the keyboard.
b) Type “wsreset.exe” and press “Enter”.
c) Reboot the computer and then check the issues with the Apps.

If the issue persists, then check if you are using any proxy settings to connect to the Internet. If yes, then go ahead with the next method to disable it.

Method 4: Disable the Proxy Settings.

If you are connected to the Internet using the proxy settings, then the Windows 8 Apps cannot connect to the Internet and thus they do not work properly as expected. So, we need to check and disable the proxy settings in the computer. Follow these steps to disable the proxy settings and check if it helps.

a) Press “Windows Logo” + “R” keys on the keyboard, type “inetcpl.cpl” and press “Enter”.
b) Click the “Connections” tab, and then click “LAN settings”.
c) Uncheck the “Use a proxy server for your LAN” check box.
d) Click “Ok”.

More information can also be found in the linked thread.

Hope this helps!

Mike
Windows Outreach Team – IT Pro
Windows for IT Pros on TechNet