MWSOESTB.DLL is a Spyware.MyWebSearch. MWSOESTB.DLL is a Browser Helper Object. MWSOESTB.DLL monitors user Internet activity. Related files: %Program Files%\MyWebSearch\bar\2.bin\MWSOEMON.EXE %Program Files%\MyWebSearch\bar\2.bin\MWSOESTB.DLL %program files%\mywebsearch\bar\2.bin\mwsbar.dll %program files%\mywebsearch\srchastt\2.bin\mwssrcas.dll Removal: Remove MWSOESTB.DLL from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.