ctbclick.exe is known to be a type of spyware. Backup your machine and remove this file, or perform a free scan of your machine to be certain.

CTB Click Spyware is a type of malware, and ctbclick is linked to it. Before making any changes to your machine, you should backup your files, or create a Windows system restore point, so you don't lose any important data.

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If ctbclick.exe is running on your machine, there's probably more adware or malware you haven't discovered. Get a free scan of your machine.