Coupon Server is an adware program bundled with multiple apps that are downloaded from the Internet by users. This program may appear on PCs without a user's knowledge. Coupon Server may appear to be useful, but can be intrusive and display ads without users' permissions. Coupon Server is also considered as a malicious domain and browser hijack. It will hijack your Internet browser and forcibly lead a user to its homepage, which is disguised as a legitimate search engine to fool visitors and benefit its website. It will direct the browser to a suspicious domain, alter browser settings and finally take over the whole browser.