WIN 10 version 19569 (and the previous 3 updates)
Boinc manager version 7.14.2 (64bit)
As soon as I load BOINC Manager after a restart, the listings load. They don't do anything but just use 0.1 MB of memory. In Task Manager I could "end task" one by one (no, I don't do it) or in Task Manager Details "end process tree" of boinctray.exe one-by-one.

The Manager now requires me to load LocalHost as the computer, having lost the auto login.

Uninstalling/reinstalling BOINC makes no difference.

BOINC Manager works okay otherwise. I've enjoyed participating for more than 20 years.

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WIN 10 version 19569 (and the previous 3 updates)

What you're experiencing might well be a bug in your Windows 10 insider program version.

As soon as I load BOINC Manager after a restart, the listings load. They don't do anything but just use 0.1 MB of memory. In Task Manager I could "end task" one by one (no, I don't do it) or in Task Manager Details "end process tree" of boinctray.exe one-by-one.

The Manager now requires me to load LocalHost as the computer, having lost the auto login.

boinctray.exe is the BOINC idle detection program used by the BOINC client, not BOINC Manager. BOINC Manager has its own internal code that checks for computer idleness, it uses no external program for that.

Normally boinctray.exe starts once at Windows startup, and otherwise when not found to be running, at client startup.
It has no effect on BOINC Manager's ability to communicate with the client. If you have lost auto-login of BOINC Manager on the client, try to remove gui_rpc_auth.cfg from the data directory and restart both the client and the manager. Make sure that both boincmgr.exe and boinc.exe are allowed to communicate with each other through the firewall on TCP 31416. And for that matter, things like boinctray.exe and boinc.scr use that same port.

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