If you repeatedly have JavaScript errors in Internet Explorer, as well as Firefox, Chrome, and Opera, and when viewing the source of any page, you may notice a reference to 127.0.0.1:{random_port}/xpopup.js.
This script is inserted by a dll hook, and is extremely hard to get rid of. It is caused by an incorrect or incomplete removal of CA Antivirus, Antispyware, and Internet Security Products.
To fix this problem, you will need to use one of the removal tools, listed below:
CA Internet Security Suite 2007 and 2008
CA Anti-Virus
CA Anti Spyware
CA Personal Firewall
CA Anti Spam
CA Website Inspector
CA Parental Control
CA DNA Desktop Migrator
