[users@httpd] first quest by english,apache2.4 service can't start!

[h d]

httpd.conf file has checked ,syntax is correct，my system is win2012,x64, run 
httpd.exe  by cmd console  is ok, but as windos servcies it can't start.


I change service's log user to administrator ,running,,why?

anthor pc win10 coun't have to do this,