Msld.dll is a Trojan Trojan.Spbot.B. Msld.dll spreads by e-mail and via open network shares. Msld.dll sends spam. Related files: %System%\msld.dll %System%\divxenc.exe Adds the value: "divx" = "%System%\divxenc.exe" to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Remove msld.dll from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.