How to Uninstall choosecoupon From Your PC Entirely?

"Hi, I think I got something bad on my PC. When I surf the Internet, different ads from choosecoupon always flood into my screen. Besides, I find that my browsing speed is becoming slower and slower. And I need to wait for several minutes before my searching results come out. I feel exhausted about that. Who can help me solve this problems, what should I do?"