Windows sandbox fails with “apply deny-read ACLs”; Node runtime, Browser, and Computer Use cannot start

What version of the Codex App are you using (From “About Codex” dialog)?

26.825.6671.0

What subscription do you have?

Chat GPT Plus

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64

What issue are you seeing?

node_repl kernel exited unexpectedly

node_repl diagnostics: {
"kernel_pid": "[REDACTED]",
"kernel_status": "exited(code=1)",
"kernel_stderr_tail": "windows sandbox failed: helper_unknown_error: apply deny-read ACLs",
"reason": "stdout_eof",
"stream_error": null
}
node_repl kernel exited unexpectedly

node_repl diagnostics: {
"kernel_pid": "[REDACTED]",
"kernel_status": "exited(code=1)",
"kernel_stderr_tail": "windows sandbox failed: orchestrator_helper_exit_nonzero: setup helper exited with status Some(1)",
"reason": "stdout_eof",
"stream_error": null
}

What steps can reproduce the bug?

Feedback ID: 01a04875-a204-7b10-9d3e-d5a4190856c1

What is the expected behavior?

the runtime starts and returns 2.

Actual result: the process exits while the Windows sandbox helper is applying deny-read ACLs. No project files or browser state are modified.

Additional information

Feedback Id: 01a04875-a204-7b10-9d3e-d5a4190856c1

Start by reproducing the Windows sandbox failure for the node_repl runtime using feedback ID 01a04875-a204-7b10-9d3e-d5a4190856c1, then trace the Windows sandbox helper path that applies deny-read ACLs. Check whether the same failure affects Browser and Computer Use. Done means the sandbox setup completes and the runtime starts and returns 2 without modifying project files or browser state.