I was facing the same issue, but finally resolved by the below:

Restarting the Base Filtering Engine in Services.msc uninstalling the Application followed by a reboot. then upgrading to 4.3 version.

Disbale ICS - internet connection sharing service

hope it resolves your problem.

I was facing the same issue, but finally resolved by the below:

• Restarting the Base Filtering Engine in Services.msc.
• uninstalling the Application, followed by a reboot.
• then upgrading to 4.3 version.

Disable ICS – internet connection sharing service