Winsms.dll is a Trojan Backdoor.Nibu.K . winsms.dll opens a back door on TCP port 9125. winsms.dll spreads via open network shares. winsms.dll tries to terminate antiviral programs installed on a user computer. Related files: %System%\winldra.exe %Windir%\dvpd.dll %Windir%\netdx.dat %Windir%\prntsvra.dll %Windir%\TEMP\fa4537ef.tmp %Windir%\winsms.dll Adds the value: "load32" = "%System%\winldra.exe" to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Remove winsms.dll from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.