LiveHelpNow will officially end support for Windows XP on December 31st, 2014.
Microsoft stopped supporting windows XP earlier this year.
If you are still using Windows XP you need to make sure that you are running Windows XP Service Pack 3
Also that you are running the latest .net framework available for XP
And finally make sure that TLS crypto protocol is enabled in your Internet Explorer browser.
We also encourage you to upgrade your Windows OS as soon as possible.