It is not easy to completely remove this but it is possible. As you can see below, read carefully what is being installed. Please pay special attention what you install. Please do not trust the Fake Adobe Flash Player installer pop-up: See also: Amazon Winner, Free Gift Card, Congratulations Scams & How To Stop Them How to remove weknow.ac This article explains how you can uninstall the weknow.ac malware.
The way it operates is to hijack your browser settings and then to change your default search engine to without your participation. It targets Safari, Mozilla Firefox, and Google Chrome. On your computer, weknow.ac is probably installed via a fake Adobe Flash update. This particular malware is a fake search engine (It may look innocent but we know.ac records your activity without your permission. It is basically a program that can hurt your Mac.
Weknow.ac is malware or malicious software.