Removing the Bad Stuff

Applications
Show the Add or Remove Programs dialogue box in Windows, or the Applications folder on Mac OS X. Review the list and see if there is odd-sounding or unknown software (you could pre-install unwanted software in advance as a demonstration). Show how uninstallation can be done from this window.
Plug-ins
Explain that plugins that get installed into a browser may compromise the security of their Online activity and accounts. Open up Firefox and/or Chrome and access the Extensions or Plug-ins page and review for unknown or odd-sounding extensions. Show how to delete and deactivate plugins from this page.

Potentially Unwanted Applications
Explain that this is a class of software recognized by anti-virus as software that may have been unintentionally installed by users. The following anti-virus applications can scan for so-called PUPs (potentially unwanted applications):
•AVG: http://free.avg.com/us-en/homepage
•Avast!: https://www.avast.com/en-us/index
•Kaspersky: http://usa.kaspersky.com/products-services/home-computer-security/
•ESET: http://www.eset.com/us/home/windows-antivirus/
•McAfee: http://home.mcafee.com/Default.aspx?rfhs=1