Windows Firewall will often prevent Windows 8 applications from working properly. You can solve this problem by adding an exception and allowing the application to pass the firewall.
Step 1. Look for the "Firewall" in the Windows 8 Start menu
Click on the Settings option.
Step 2. Select Windows Firewall from the options in the upper left
Step 3. Click "allow an application or function to pass through Windows Firewall" in the Windows Firewall window
Step 4. Click "Change settings" in the next window
Click "Allow another app …" in the lower right corner.