Here are some troubleshooting stepsthat you can try to resolve this problem.

Method 1: Reset store cache.1. PressWindows key + R.2. Type in WSReset.exe.3. PressENTER.4. Restart the computer and check.If the above method does not work, go to next method.

Method 2:Run app troubleshooter and check if that helps.

What to do if you have problems with an apphttp://windows.microsoft.com/en-US/windows-8/what-troubleshoot-problems-appIf the above method does not work, go to next method.

Method 3: Run Windows update troubleshooter which will automatically fix some common problems with Windows Update.

a. PressWindows + Wkey on the keyboard.b. Typetroubleshootingin the search tab and pressEnter.c. ClickView allon left panel.d. ClickWindows Update, new window will popup.e. Follow the on screen instructions.

Hope this helps and do let us know if you need any assistance.