Cygwin window closes immediately

The configuration:

• Windows 10 (64-bit) (Fresh installation)


• Cygwin64 fresh installation (downloaded setup-x86_64.exe)

Installation looks like it worked. However, when I try to launch the newly created shortcut, the window closes immediately.

The shortcut target is C:\cygwin64\bin\mintty.exe -i /Cygwin-Terminal.ico -.

If I modify it to C:\cygwin64\bin\mintty.exe -h always -i /Cygwin-Terminal.ico -, the window stays open, but the message inside is Failed to run /Cygwin-Terminal.ico: Permission denied.

The following might be a red herring, but I suspect it is actually related to the problem: If I run cmd and cd c:\cygwin64, I can run Cygwin.bat, however the prompt is Unknown+User@DESKTOP-6SQ80GV ~, which is not actually my username. /cygdrive/c/cygwin64/Cygwin-Terminal.ico is owned by Unknown+User with group of Administrators, and has permissions of 644. If I chmod +x it, the error message in the window changes to:

C:/cygwin64/sbin/nologin.exe: error while loading shared libraries: ?: cannot open shared object file: No such file or directory
/sbin/nologin: Exit 127

I've done some quick searching and my google-fu is apparently failing, as I'm not finding much to go on. I'm guessing I could thrash around and eventually make things work, but I'm wondering if anyone here knows "what is the right way to fix this problem?".