pl.dll is a Spyware.CMKeyLogger. pl.dll monitors user Internet activity and private information. It sends stolen data to a hacker site. Related files: %ProgramFiles%\WINLOGON.exe %System%\pl.dll %System%\WinSystems.exe %System%\WSCpmSet.dll %System%\WSCpmWCl.dll More info: http://securityresponse.symantec.com/avc... Removal: Remove pl.dll from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.