Colleague.top pop-ups in your browser are actually the trace of adware enabled currently in your computer. This may be some suspicious process running in the background, or some browser add-on (extension) that causes these pop-ups. Whatever the case might be, occurrence of colleague.top pop-ups in your system means that the computer is in a trouble. You are strongly advised to perform thorough scanning of your system using proven anti-virus software as explained in the guide below. Failure to remove colleague.top pop-ups may result in further damage to be made for your workstation.