Turn off 'Windows Fax and Scan'

I saw a 3+ year old log file in appdata\temp and some quick searching indicated that it is related to 'Windows Fax and Scan'. I went to Control Panel -> Programs and Features -> Turn Windows features on or off -> Print and Document Services, but when I cleared the box next to 'Windows Fax and Scan', the system reported 'An error has occurred. Not all of the features were successfully changed.'

What on earth is going on?

What do you have set as your default printer?

Adobe PDF