Dear IT experts,

I am having some serious issues using my computer recently. Whenever i launch my browser, site shows up. I also see pop-up ads that launch page as well. Besides, various banners appear when I browse the Internet. These banners are extremely annoying and I AM sure they do not appear from websites that I visit. What makes these ads appear? I don’t like them and I would like to see removal guide (if you have it). Thank you, hope you can help me to solve this issue!