Printer Settings could not be saved. Operation could not be completed (Error 0x000006D9)

Error message when you use the Add Printer Wizard to share a printer:

This issue may occur if you have stopped or disabled the Windows Firewall Service. To share printers in Windows 7 or in Windows Server 2008 R2, you must have the Windows Firewall Service enabled.

To resolve this issue, set the Windows Firewall Service to Automatic, and then start the service.