“…tells you what BHOs appear on your system, and lets you diagnose and resolve conflicts by temporarily disabling them. BHOs are a special type of add-in for Internet Explorer 4 or higher. Their unusually tight integration with Explorer allows them to be used in a myriad of ways, but also can lead to problems. Poorly written BHOs can cause Explorer to crash. Also, BHOs can conflict with each other, causing problems with Explorer. These problems can be very difficult to diagnose and fix because there’s no way for you to know that a BHO has been installed. Windows doesn’t provide a way to see the BHOs on your system, and some BHOs (for example, adware) operate invisibly and don’t have a user interface. BHO Cop can solve these problems. You can save different configurations for use at different times. Some BHOs perform a self-check each time Windows starts and, if disabled, will re-enable themselves automatically. BHO Cop is smart enough to handle this situation, restoring your most recent configuration each time you start Windows. If a BHO is not installed correctly, BHO will alert you of the problem and allow you to clear the nonfunctioning registry entries from your system.” PCMag