Windows build not working out of the box

[Arnaud Chéritat]

Installed SageMath-8.7-Installer-v0.4.3.exe on Windows 10 (64bits, v10.0.17134)

Ran "SageMath 8.7 Notebook" (double-clicked the icon on desktop)

A terminal opened, said something, closed, nothing happened.

Waited a little bit.

Ran "SageMath 8.7 Notebook" again.

Terminal opens, speaks to me on pink background :

/bin/bash: Exit 126.

Failed to run '/bin/bash': No such file or directory

Rebooted computer

Ran "SageMath 8.7 Notebook" again.

Same result.

Machine : Gigabyte P55V5.

Antivirus : Avast.

This PC has Python 2.7 in the Path environment variable, and also Java, php, npm.

There is a also a Cygwin folder but I don't think it has any impact, its path is not in the Path environment variable.

[E. Madison Bray]

It sounds like a permissions issue on your computer's filesystem. I
was able to reproduce the problem as you described it by navigating
(in explorer) to my Sage installation directory, in my case
"C:\Users\Erik M. Bray\AppData\Local\SageMath 8.7", and manually
changing the permissions on "runtime\bin\bash.exe" so that I could not
read or execute the file. That produced the same results.

It's possible that whatever directory you installed Sage to has its
permissions inherited, possibly from a parent directory, that is
screwing up permissions on the executables in your Sage installation.

I would suggest uninstalling, checking that the ACLs (access control
lists) on the path you're installing to look sane (see e.g.
https://www.pcworld.com/article/3151045/how-to-reclaim-file-permissions-and-ownership-in-windows.html)
and reinstalling.