Backdoor.Preft is a backdoor Trojan that infiltrates a computer via security vulnerabilities and creates a backdoor port by which an unauthorized user may gain remote access to the infected system. When activated, Backdoor.Preft creates potentially infected files on the infected system. Backdoor.Preft makes modifications to the Windows Registry. Backdoor.Preft may also reconfigure assorted Windows system tools in order to prevent the user from removing the threat and performing system scans. Backdoor.Preft can damage or remote critically important legitimate components from the infected system.