XMPP was unable to connect!Login attempts return an error

[ArcaneFire]

Login attempts return an error:
"XMPP was unable to connect!
Make sure that your XMPP login information is correct."
The login info is verified, issue 24 installation location is correct, Anti-virus exceptions are in place. Is the problem with my C.O.T account, or is there more troubleshooting to be done on my end?

[ArcaneFire]

For others who might experience this in the future - re-installing Norton's A/V, and excluding the Paragon Chat files (again) cured the problem.

[FloatingFatMan]

For others who might experience this in the future - re-installing Norton's A/V, and excluding the Paragon Chat files (again) cured the problem.

Uninstalling that garbage and going with an AV that's actually effective would also work well. :p