Addendum:
If you DID click on that link, and allowed a codec to install, run your antivirus and spyware program, preferably in safe mode.
If you still find the following programs in Add/Remove Programs, follow the instructions at the following link to remove it:
http://forums.spywareinfo.com/index.php?showtopic=86300
Note, the cleanup program will alter some settings back to defaults, such as your desktop wallpaper and your default IE webpage.
If you find a better way to remove Safety Alerter 2006 and/or SoftCodec, by all means use it.