Dllsys.dll is a password-stealing Trojan PWSteal.Bancos.Y. Dllsys.dll monitors user Internet activity and bank information. It sends stolen data to a hacker site. Related files: %System%\svcsys.dll %System%\dllsys.dll Adds the value: "SvcSys" = "{FCF39D40-4CAB-49B4-B6F4-955EC73FD3B3}" "(Default)" = "svcsys.dll" to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Remove dllsys.dll from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.