ns.dll is an adware program Adware.Begin2search. ns.dll monitors user Internet activity. ns.dll displays advertising information. Related files: %System%\reg6523.exe %System%\winb2s32.dll %System%\winbbb.dat %System%\dsktrf.dll %System%\ns.dll %System%\trgen.dll %System%\rtneg.dll %Windir%\Downloaded Program Files\winb2s32.inf More info: http://securityresponse.symantec.com/avc... Removal: Remove ns.dll from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.