Download duplicatefilter.zip from the link above. The file has been analyzed for malware but we advise you to check it using you own antivirus solution or downloading AVG AntiVirus Free as a free alternative. After installation of 1.9 MB, double-click on it and follow the setup instructions.
You can uninstall Duplicate Filter without any problems. Click Start and then Control Panel. Choose the program you need to remove and press Uninstall.