You have no idea about how Win32.PUP-gen [PUP] installed on your computer. You may just receive the warning by the antivirus detection and don't know how to remove it. Don’t worry. Here the post can give you a hand to get rid of the malware completely.
Learn About Win32.PUP-gen [PUP]
Win32.PUP-gen [PUP] is a dangerous Trojan malware that may install on your computer along with the free download of some software, since the freeware was bundled with the Trojan. Once your computer was infected by this Trojan, it will change your browser setting and cause browser hijacker. It will redirect you to some advertisements links that full of pop up and banner, which ask you to buy unwanted products. It may change your default homepage to those spam websites when you search the internet.