There are few things we can do to try to track down the cause of the issue:
1) Run the following command in the status window to turn off a number of features:
//treebar off | switchbar off | ebeeps off | flood off | remote off | notify off | ignore off | aop off | avoice off | protect off
2) Open the Address Book/Highlight dialog and turn off highlighting.
3) Open the Options/Connect/Options/Ports dialog and turn off all UPnP options.
4) Open the Options/IRC/Logging/Options dialog and turn off all logging.
If you do the above, does that help at all?
If it does not, are you using anti-virus or security software? If you disable/unload it, does that help?
Last edited by Khaled; 26/03/14 02:59 PM.