Running setup-x86_64.exe from cmd does nothing but works from cygwin itself

[Jon Turney]

On 12/02/2024 01:05, wsnyder--- via Cygwin wrote:
> I have a Windows Version 10.0.19044 Build 19044 system with Cygwin
> installed a while ago.
> 
> Opening the cygwin terminal (which works fine), I see it is running:
> 
> CYGWIN_NT-10.0-19044 version 3.3.6-341.x86_64 (corinna@calimero) (gcc
> version 11.2.0 20210728 (Fedora Cygwin 11.2.0-2) (GCC) ) 2022-09-05
> 11:15 UTC
> 
> I needed to install some packages so downloaded setup-x86_64.exe onto
> my desktop. When I run it from the desktop I get the "busy" cursor
> for a fraction of a second and nothing happens.  When I open the
> native Windows cmd prompt as administrator, and run
> "setup-x86_64.exe" or "setup-x86_64.exe -v" or "setup-x86_64.exe
> --asdjasdjaskdhj", I just get the prompt back.
> 
> If, however I startup the cygwin terminal (vs cmd window) and run
> setup-x86_64.exe, it starts correctly.  However I'm afraid to run it
> this way as if it crashes I'll presumably never be able to run setup
> again.

This seems highly speculative.

> This is a work machine so while I have admin, it's completely
> possible they've added some broken virus checker rule that is now
> preventing it from running. But, I get no alert, which I normally
> would doing something unusual, and that it works under cygwin itself
> seems odd.
This is very odd behaviour.

If you really suspect some AV problems, it may help to try the 
uncompressed setup executable, available from [1]


[1] https://cygwin.com/setup/