I first uninstalled it from the "Control Panel-Add/Remove Programs" section.. (Or Control Panel-Programs and Features if you're using Win7), then I went into each of the browsers "Add-ons" sections and eliminated it from there.. Fairly easy removal and it seemed like it was gone..
Have you tried all the suggestions in the link below?
Google Search for "uninstall coupon compainion"
Hope this helps.
Many of us were "gifted" Coupon Companion by CNET, so this seems a reasonable place to look for answers. There are 80+ entries in Feedback Forum, but the only removal advice I found on CNET.is to use control panel and to delete browser add-ons and extensions. http://download.cnet.com/2701-2023_4-2006-8.html
I thought CC was just a nuisance, until I looked into removal. On zimbio they say it 'changes browser settings and modifies registry entries secretly'., and that it 'gathers personal information like browsing habits, online banking details, IP address and delivers it to remote hackers.' If true, CC is more than a nuisance What is really known about Coupon Companion?
If CC is as bad as that, the simple CNET removal suggestions seem unlikely to do a complete job. McAfee VirusScan + AntiSpyware Enterprise 8.8 did not stop it, and Malwarebytes did not find it on my PC. Next thing I plan to do is update and run Spybot S&D or SuperAntispyware. What is the wisdom here about removing CC?