diff --git a/scripts/e2e/telegram-user-crabbox-proof.ts b/scripts/e2e/telegram-user-crabbox-proof.ts
index dcefaf0ee648..a858450d4d24 100644
--- a/scripts/e2e/telegram-user-crabbox-proof.ts
+++ b/scripts/e2e/telegram-user-crabbox-proof.ts
@@ -1,7 +1,12 @@
 #!/usr/bin/env -S node --import tsx
 // Telegram User Crabbox Proof script supports OpenClaw repository automation.
 
-import { type ChildProcess, spawn, type SpawnOptionsWithoutStdio } from "node:child_process";
+import {
+  type ChildProcess,
+  spawn,
+  spawnSync,
+  type SpawnOptionsWithoutStdio,
+} from "node:child_process";
 import fs from "node:fs";
 import os from "node:os";
 import path from "node:path";
@@ -587,13 +592,37 @@ function timedOutError(message: string) {
 const activeCommandChildren = new Set<ChildProcess>();
 let commandCleanupHandlersInstalled = false;
 
-function signalCommandTree(child: ChildProcess, signal: NodeJS.Signals) {
-  if (child.pid && process.platform !== "win32") {
+type CommandTreeTarget = Pick<ChildProcess, "kill" | "pid">;
+
+export function signalCommandTree(
+  child: CommandTreeTarget,
+  signal: NodeJS.Signals,
+  {
+    platform = process.platform,
+    runTaskkill = spawnSync,
+    useProcessGroup = platform !== "win32",
+  }: {
+    platform?: NodeJS.Platform;
+    runTaskkill?: typeof spawnSync;
+    useProcessGroup?: boolean;
+  } = {},
+) {
+  if (child.pid && useProcessGroup) {
     try {
       process.kill(-child.pid, signal);
       return;
     } catch {}
   }
+  if (platform === "win32" && typeof child.pid === "number") {
+    const args = ["/PID", String(child.pid), "/T"];
+    if (signal === "SIGKILL") {
+      args.push("/F");
+    }
+    const result = runTaskkill("taskkill", args, { stdio: "ignore" });
+    if (!result.error && result.status === 0) {
+      return;
+    }
+  }
   child.kill(signal);
 }
 
diff --git a/test/scripts/telegram-user-crabbox-proof.test.ts b/test/scripts/telegram-user-crabbox-proof.test.ts
index 2b23599d8544..d74c373c680d 100644
--- a/test/scripts/telegram-user-crabbox-proof.test.ts
+++ b/test/scripts/telegram-user-crabbox-proof.test.ts
@@ -18,6 +18,7 @@ import {
   renderRemoteSetup,
   renderSelectDesktopChat,
   runCommand,
+  signalCommandTree,
   stageFullSessionArtifacts,
   startLocalSut,
   waitForLog,
@@ -217,7 +218,10 @@ describe("telegram user Crabbox proof log polling", () => {
     fs.mkdirSync(publishDir);
     fs.writeFileSync(path.join(publishDir, "stale.txt"), "stale");
     fs.mkdirSync(path.join(outputDir, "publish-gif-only"));
-    fs.writeFileSync(path.join(outputDir, "session.json"), '{"sshKey":"/private/tmp/openclaw/key"}');
+    fs.writeFileSync(
+      path.join(outputDir, "session.json"),
+      '{"sshKey":"/private/tmp/openclaw/key"}',
+    );
     fs.writeFileSync(path.join(outputDir, "lease.json"), '{"token":"secret"}');
     fs.writeFileSync(path.join(outputDir, "status.json"), '{"ok":true}');
     fs.writeFileSync(path.join(outputDir, "probe.json"), '{"ok":true}');
@@ -349,6 +353,31 @@ setInterval(() => {}, 1000);
     }
   });
 
+  it("signals Windows proof command process trees with taskkill", () => {
+    const child = {
+      kill: vi.fn(),
+      pid: 12345,
+    };
+    const runTaskkill = vi.fn(() => ({ error: undefined, status: 0 }));
+
+    signalCommandTree(child, "SIGTERM", {
+      platform: "win32",
+      runTaskkill,
+    });
+    expect(runTaskkill).toHaveBeenNthCalledWith(1, "taskkill", ["/PID", "12345", "/T"], {
+      stdio: "ignore",
+    });
+
+    signalCommandTree(child, "SIGKILL", {
+      platform: "win32",
+      runTaskkill,
+    });
+    expect(runTaskkill).toHaveBeenNthCalledWith(2, "taskkill", ["/PID", "12345", "/T", "/F"], {
+      stdio: "ignore",
+    });
+    expect(child.kill).not.toHaveBeenCalled();
+  });
+
   posixIt("lets timed-out command descendants exit during kill grace", async () => {
     const root = makeTempDir();
     const scriptPath = path.join(root, "trap-term-grace.mjs");