diff --git a/src/agents/bash-tools.test.ts b/src/agents/bash-tools.test.ts
index 16c0850fa..56cff37fe 100644
--- a/src/agents/bash-tools.test.ts
+++ b/src/agents/bash-tools.test.ts
@@ -9,11 +9,12 @@ import {
 import { sanitizeBinaryOutput } from "./shell-utils.js";
 
 const isWin = process.platform === "win32";
-const shortDelayCmd = isWin ? "ping -n 2 127.0.0.1 > nul" : "sleep 0.05";
-const yieldDelayCmd = isWin ? "ping -n 3 127.0.0.1 > nul" : "sleep 0.2";
-const longDelayCmd = isWin ? "ping -n 4 127.0.0.1 > nul" : "sleep 2";
-const joinCommands = (commands: string[]) =>
-  commands.join(isWin ? " & " : "; ");
+// PowerShell: Start-Sleep for delays, ; for command separation, $null for null device
+const shortDelayCmd = isWin ? "Start-Sleep -Milliseconds 50" : "sleep 0.05";
+const yieldDelayCmd = isWin ? "Start-Sleep -Milliseconds 200" : "sleep 0.2";
+const longDelayCmd = isWin ? "Start-Sleep -Seconds 2" : "sleep 2";
+// Both PowerShell and bash use ; for command separation
+const joinCommands = (commands: string[]) => commands.join("; ");
 const echoAfterDelay = (message: string) =>
   joinCommands([shortDelayCmd, `echo ${message}`]);
 const echoLines = (lines: string[]) =>
diff --git a/src/agents/bash-tools.ts b/src/agents/bash-tools.ts
index 0f37afe40..1d1175373 100644
--- a/src/agents/bash-tools.ts
+++ b/src/agents/bash-tools.ts
@@ -265,15 +265,17 @@ export function createBashTool(
             {
               cwd: workdir,
               env: process.env,
-              detached: true,
+              detached: process.platform !== "win32",
               stdio: ["pipe", "pipe", "pipe"],
+              windowsHide: true,
             },
           )
         : spawn(shell, [...shellArgs, params.command], {
             cwd: workdir,
             env,
-            detached: true,
+            detached: process.platform !== "win32",
             stdio: ["pipe", "pipe", "pipe"],
+            windowsHide: true,
           });
 
       const session = {
diff --git a/src/agents/shell-utils.ts b/src/agents/shell-utils.ts
index 6302b51d3..27ac5bf21 100644
--- a/src/agents/shell-utils.ts
+++ b/src/agents/shell-utils.ts
@@ -2,8 +2,15 @@ import { spawn } from "node:child_process";
 
 export function getShellConfig(): { shell: string; args: string[] } {
   if (process.platform === "win32") {
-    const shell = process.env.COMSPEC?.trim() || "cmd.exe";
-    return { shell, args: ["/d", "/s", "/c"] };
+    // Use PowerShell instead of cmd.exe on Windows.
+    // Problem: Many Windows system utilities (ipconfig, systeminfo, etc.) write
+    // directly to the console via WriteConsole API, bypassing stdout pipes.
+    // When Node.js spawns cmd.exe with piped stdio, these utilities produce no output.
+    // PowerShell properly captures and redirects their output to stdout.
+    return {
+      shell: "powershell.exe",
+      args: ["-NoProfile", "-NonInteractive", "-Command"],
+    };
   }
 
   const shell = process.env.SHELL?.trim() || "sh";