via Lifehacker.
What Superfish IsRead the entire article here.
Superfish is basically your run-of-the-mill adware software, but with some big security holes. Lenovo pre-installed it on some computers sold between October 2014 and December 2014, but any Windows computer can be infected. At its core, Superfish is meant to place advertisements in your web browser. The problem is that the software also intercepts encrypted traffic, which opens up your computer to man-in-the-middle attacks (which work similar to the Heartbleed security bug from last year)
The quick and dirty? Click here and here to check your computer for Super Fish!