Hrm, that MSI installs the system service, not sure if it's correctly installing:

PS C:\Users\thor\Desktop> sc.exe qc osqueryd
[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: osqueryd
        TYPE               : 10  WIN32_OWN_PROCESS
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 3   CRITICAL
        BINARY_PATH_NAME   : "C:\Program Files\osquery\osqueryd\osqueryd.exe" --flagfile=C:\Program Files\osquery\osquery.flags
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : osqueryd
        DEPENDENCIES       :
        SERVICE_START_NAME : NT AUTHORITY\SYSTEM