how to stop w11p auto system updates?

Hello:  is there a way to stop auto updates for the operating system only, windows 11pro? MS own advice goes to svcs.msc (fine). But there is no line in local gp policy ed>windows components>windows update>manage updates offered from windows update

  - corresponding to an instruction to disable just the system update. I do NOT want to disable security auto updates. 

w11p 24h2 has a network connectivity problem in local network (security) now demanding a password where before there was not this password. I have had the computer revert to w11p 23h2, and the problem disappears. I do NOT want nor need a pw to view files on another local (not "internet" or global) network.