Genuine Thunderbird installers and updates don't have any bundled software, so I have to ask where you get yours from? https://www.mozilla.org/en-US/thunderbird/all/ is my preferred location.

If this relates to http://pc-mechanic.com/index.htm all I would say is that the site charges, and yet it is likely very similar advice and help is free from other reputable sites and fora. if it is particular software installed on your computer it is probably not a Thunderbird related question. The following linked article is aimed at Firefox users but the advice on removal of malware and scanning with multiple up to date tools is still valid for Thunderbird. See * [[Troubleshoot Firefox issues caused by malware#w_how-do-i-get-rid-of-malware]]'''_how-do-i-get-rid-of-malware''' ** http://www.bleepingcomputer.com/forums <br /> http://www.spywarewarrior.com/index.php <br /> http://www.spywareinfoforum.com/