Copy the following files from the Java Service wrapper download to the Mule ESB installation:
wrapper.jar and wrapper.dll from wrapper-windows-x86-64-3.5.25\wrapper_3.5.25_src\lib to MULE_HOME\lib\boot\
wrapper.exe from wrapper-windows-x86-64-3.5.25\wrapper_3.5.25_src\bin to MULE_HOME\lib\boot\exec