You may find Modern UI Apps aren't loading, installing or updating in Windows 8. There are a few simple solutions that should work.
Firstly run the Windows Store Apps Troubleshooter. This resolves most problems.
If the troubleshooter fails to work, it may be worth checking that the Windows Firewall is enabled, as Windows 8 Apps depend upon it.
- Press Windows Key + X, Click Run
- Type Services.msc and Press OK
- In Services, Scroll down to Windows Firewall
- Check that it's set to 'Automatic' and if it's not already running, press Start.
Some have found their issues solved by:
Press Windows Key + X and click 'Command Prompt Admin'
Type the following:
net stop wuauserv - Press Enter
rename c:\windows\SoftwareDistribution softwaredistribution.old - Press Enter
net start wuauserv - Press Enter