opam 2.3.0 on Windows 11

[andreibucsan]

If your issue concerns a package not building, please report to
https://github.com/ocaml/opam-repository/issues or to the package maintainer
unless you are confident it is an issue in the opam tool itself.
If your issue concerns failures with the opam.ocaml.org website, please report to
https://github.com/ocaml/infrastructure/issues

<include here the output of `opam config report`, if applicable>

Opam 2.3.0

Unfortunately, this release doesn't work on Windows 11. It doesn't fix the issues in the previous releases.
OS:
Edition Windows 11 Pro
Version 23H2
OS build 22631.4460
Experience Windows Feature Experience Pack 1000.22700.1047.0

Opam seems to have an issue with curl:

OpamDownload.Download_fail(_, "curl failed: \"C:\\\\Windows\\\\system32\\\\curl.exe --write-out %{http_code}\\\\n --retry 3 --retry-delay 2 --user-agent opam/2.3.0 -L -o C:\\\\Users\\\\Andrei\\\\AppData\\\\Local\\\\Temp\\\\opam-1508-2c7e93\\\\sha512.sum.part -- https://cygwin.com/sha512.sum\" exited with code 35")

Error log: in "~\AppData\Local\Temp\" folder:
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
curl: (35) schannel: next InitializeSecurityContext failed: CRYPT_E_NO_REVOCATION_CHECK (0x80092012) - The revocation function was unable to check revocation for the certificate.

Interestingly enough, it works without any problems on Windows 10. But downgrading the OS is not an option.
I also tried manually installing Cygwin and Msys2, it doesn't work. It ends in curl returning an error.
Also tried with the official binary of curl, instead of the Windows curl. Same result.

Please try to fix this issue, thank you.

[acasta-yhliu]

It seems the problem is from Cygwin, not opam? Since:

I also tried manually installing Cygwin and Msys2, it doesn't work. It ends in curl returning an error.

If you could check again, it would be really helpful!

[andreibucsan]

I close this issue as it seems I opened it by mistake. The only problem was Norton antivirus which blocked curl connections. I solve it by adding exclusions for https://cygwin.com/ and https://opam.ocaml.org. As a side note, after la last major update, Norton became extremely aggressive. At least so I perceive it. Thanks.