Casir 2 2 can’t remove trojan and malware

I was recently browsing a website and looks like my computer got infected by malware and Trojan-Downloader. Win32. Todon. ai. I downloaded Casir 2.2 freeware and launched the app immediately and said that it removed the threat. But when I launched the app again, it's still there. It only corrected 1 registry problem. Does Casir 2 2 really work?
