diff --git a/codex-rs/core/src/exec.rs b/codex-rs/core/src/exec.rs
index 6eb3c585c3..2d7f3a164e 100644
--- a/codex-rs/core/src/exec.rs
+++ b/codex-rs/core/src/exec.rs
@@ -431,6 +431,39 @@ fn record_windows_sandbox_spawn_failure(
     }
 }
 
+#[cfg(target_os = "windows")]
+fn is_powershell_executable(path: &str) -> bool {
+    matches!(
+        Path::new(path)
+            .file_name()
+            .and_then(|name| name.to_str())
+            .unwrap_or(path)
+            .to_ascii_lowercase()
+            .as_str(),
+        "powershell" | "powershell.exe" | "pwsh" | "pwsh.exe"
+    )
+}
+
+#[cfg(target_os = "windows")]
+fn ensure_powershell_no_profile_for_sandbox(mut command: Vec<String>) -> Vec<String> {
+    let Some(program) = command.first() else {
+        return command;
+    };
+    if !is_powershell_executable(program) {
+        return command;
+    }
+    if command
+        .iter()
+        .skip(1)
+        .any(|arg| arg.eq_ignore_ascii_case("-NoProfile") || arg.eq_ignore_ascii_case("/NoProfile"))
+    {
+        return command;
+    }
+
+    command.insert(1, "-NoProfile".to_string());
+    command
+}
+
 #[cfg(target_os = "windows")]
 async fn exec_windows_sandbox(
     params: ExecParams,
@@ -455,6 +488,7 @@ async fn exec_windows_sandbox(
     if let Some(network) = network.as_ref() {
         network.apply_to_env(&mut env);
     }
+    let command = ensure_powershell_no_profile_for_sandbox(command);
 
     // TODO(iceweasel-oai): run_windows_sandbox_capture should support all
     // variants of ExecExpiration, not just timeout.
diff --git a/codex-rs/core/src/exec_tests.rs b/codex-rs/core/src/exec_tests.rs
index 3cde807c0f..30b6e0365a 100644
--- a/codex-rs/core/src/exec_tests.rs
+++ b/codex-rs/core/src/exec_tests.rs
@@ -77,6 +77,61 @@ fn sandbox_detection_uses_aggregated_output() {
     ));
 }
 
+#[cfg(target_os = "windows")]
+#[test]
+fn windows_sandbox_powershell_inserts_no_profile() {
+    let command = ensure_powershell_no_profile_for_sandbox(vec![
+        "powershell.exe".to_string(),
+        "-Command".to_string(),
+        "Write-Output ok".to_string(),
+    ]);
+
+    assert_eq!(
+        command,
+        vec![
+            "powershell.exe".to_string(),
+            "-NoProfile".to_string(),
+            "-Command".to_string(),
+            "Write-Output ok".to_string(),
+        ]
+    );
+}
+
+#[cfg(target_os = "windows")]
+#[test]
+fn windows_sandbox_powershell_preserves_existing_no_profile() {
+    let command = ensure_powershell_no_profile_for_sandbox(vec![
+        "pwsh.exe".to_string(),
+        "-NoLogo".to_string(),
+        "-NoProfile".to_string(),
+        "-Command".to_string(),
+        "Write-Output ok".to_string(),
+    ]);
+
+    assert_eq!(
+        command,
+        vec![
+            "pwsh.exe".to_string(),
+            "-NoLogo".to_string(),
+            "-NoProfile".to_string(),
+            "-Command".to_string(),
+            "Write-Output ok".to_string(),
+        ]
+    );
+}
+
+#[cfg(target_os = "windows")]
+#[test]
+fn windows_sandbox_powershell_detects_full_path() {
+    let command = ensure_powershell_no_profile_for_sandbox(vec![
+        r"C:\Program Files\PowerShell\7\pwsh.exe".to_string(),
+        "-Command".to_string(),
+        "Write-Output ok".to_string(),
+    ]);
+
+    assert_eq!(command[1], "-NoProfile");
+}
+
 #[test]
 fn sandbox_detection_ignores_network_policy_text_with_zero_exit_code() {
     let output = make_exec_output(
diff --git a/codex-rs/core/src/tools/spec_tests.rs b/codex-rs/core/src/tools/spec_tests.rs
index a635a0f9e3..cc1836515b 100644
--- a/codex-rs/core/src/tools/spec_tests.rs
+++ b/codex-rs/core/src/tools/spec_tests.rs
@@ -174,6 +174,7 @@ fn multi_agent_v2_tools_config() -> ToolsConfig {
         session_source: SessionSource::Cli,
         sandbox_policy: &SandboxPolicy::DangerFullAccess,
         windows_sandbox_level: WindowsSandboxLevel::Disabled,
+        image_generation_tool_auth_allowed: true,
     })
 }