Windows XP Firewall
This topic applies to KCT 3.12.7 and earlier. If you are on KCT NG 2026.2 or later, see NG topic.
If you are running CatTools on an XP system you need to be aware that after Service Pack 2 the XP Firewall is turned on by default.
You may need to configure an exception for CatTools or make another adjustment if you continue to run with the XP Firewall on.