What is "spysheriff"

SpySheriff, also known as Brave Sentry, Pest Trap, SpyTrooper, Spywareno, and MalwareAlarm, is malware that disguises itself as an anti-spyware program. SpySheriff attempts to mislead a user into buying the program by repeatedly informing them of false threats to their system. It is very difficult to remove SpySheriff from machines, since it nests its components in System Restore folders, and also blocks some system management tools. Similar to most fake antiviruses, SpySheriff asks the user to register when they click "Remove found threats". However, SpySheriff can be removed if the user already has anti-malware tools on the machine, or owns a rescue disk.