Explorer.dll is a Trojan.Wayphisher. Explorer.dll tries to terminate antiviral programs installed on a user computer. Explorer.dll monitors user Internet activity and bank information. It sends stolen data to a hacker site. Related files: explorer.dll More info: http://securityresponse.symantec.com/avc... Removal: Remove explorer.dll from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.