Hello,
I had this problem , it is now fixed,
first make sure you set you country and language settings right to your real country you live in.
the open : Control Panel\All Control Panel Items\Troubleshooting
then click on : fix problems with windows update
Click : next
Click : Try Troubleshooting as an Administrator
Click : close
restart you pc.
the try to update your apps on the app store.
hope this solve your problem.
regards