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I have the exact same error, ("Error 517") when I attempt to play any TV show from xfinitytv.comcast.net.
I've tried Chrome, Firefox, re-installing both and flash no change.
What is going on?
Hi, this is the typical X finity /comcast not working they will blame you and your system when the whole time it is their system not working. it usuually fixes itself in a couple to few hours. Don't waste your time calling or chatting they will not help only mislead and misdirect you.