Fix Internet Connection Sharing Error Null or 80004005 in Windows 7

When you try to enable Internet Connection Sharing in your Windows 7 computer via your network connection properties, one of the following errors may occur:

An error occurred when enabling internet connection sharing. (null)

-or-

Cannot enable shared access.

Error 0x80004005: Unspecified error

To resolve the problem, make sure that the following services are started and running:



  • Base Filtering Engine (Automatic)
  • Network Connections (Manual)
  • Remote Access Connection Manager (Manual)
  • Windows Management Instrumentation (Automatic)
  • Windows Firewall (Automatic)

In order for ICS to work Windows Firewall service needs to be enabled, although Windows Firewall isn’t listed as one of ICS dependencies.

To enable a service, launch Services MMC (Services.msc). Double-click a service, set the service start type accordingly as above, and click Start to start the service. Installing a third-party firewall software disables the Windows Firewall service. In order for ICS to work, you’ll have to enable/start the Windows Firewall service again.


One small request: If you liked this post, please share this?

One "tiny" share from you would seriously help a lot with the growth of this blog. Some great suggestions:
  • Pin it!
  • Share it to your favorite blog + Facebook, Reddit
  • Tweet it!
So thank you so much for your support. It won't take more than 10 seconds of your time.

Ramesh Srinivasan is passionate about Microsoft technologies and he has been a ten-time recipient of the Microsoft MVP award in Windows Desktop Experience (Windows Shell), from 2003 to 2012. Ramesh founded Winhelponline.com in 2005.

Leave a Comment