diff --git a/hooks/cursor-office-hook.ps1 b/hooks/cursor-office-hook.ps1
new file mode 100644
index 0000000..d25a72d
--- /dev/null
+++ b/hooks/cursor-office-hook.ps1
@@ -0,0 +1,45 @@
+# Cursor Office hook script for Windows
+# Reads hook event JSON from stdin, writes activity state to a temp file.
+$stateFile = Join-Path $env:TEMP "cursor-office-state.json"
+$data  = $input | Out-String | ConvertFrom-Json
+$event = $data.hook_event_name
+$ts    = [int][double]::Parse((Get-Date -UFormat %s))
+
+$state = $null
+
+switch ($event) {
+  "preToolUse" {
+    $tool = $data.tool_name
+    $activity = switch ($tool) {
+      { $_ -in "Read","Glob","SemanticSearch","Grep" } { "reading" }
+      { $_ -in "Write","StrReplace","EditNotebook","Delete" } { "editing" }
+      "Shell" { "running" }
+      "Task"  { "phoning" }
+      default { "typing" }
+    }
+    $state = @{ activity = $activity; tool = $tool; ts = $ts }
+  }
+  "subagentStart" {
+    $state = @{ activity = "phoning"; ts = $ts }
+  }
+  "subagentStop" {
+    $state = @{ activity = "typing"; ts = $ts }
+  }
+  "stop" {
+    $activity = switch ($data.status) {
+      "completed" { "celebrating" }
+      "error"     { "error" }
+      default     { "idle" }
+    }
+    $state = @{ activity = $activity; ts = $ts }
+  }
+  "beforeSubmitPrompt" {
+    $state = @{ activity = "idle"; ts = $ts }
+  }
+}
+
+if ($state) {
+  $state | ConvertTo-Json -Compress | Set-Content $stateFile -Encoding UTF8
+}
+
+exit 0
diff --git a/src/cursorWatcher.ts b/src/cursorWatcher.ts
index 1abf84e..2348b0a 100644
--- a/src/cursorWatcher.ts
+++ b/src/cursorWatcher.ts
@@ -3,7 +3,7 @@ import * as path from 'path';
 import * as os from 'os';
 import * as vscode from 'vscode';
 import { parseTranscriptLine, ParsedStatus } from './transcriptParser';
-import { isHooksInstalled, getStateFilePath } from './hooksInstaller';
+import { isHooksInstalled, getStateFilePath, IS_WINDOWS } from './hooksInstaller';
 
 export class CursorWatcher implements vscode.Disposable {
   private watchers: fs.FSWatcher[] = [];
@@ -105,14 +105,17 @@ export class CursorWatcher implements vscode.Disposable {
       }
     };
 
-    try {
-      this.hooksWatcher = fs.watch(path.dirname(stateFile), { persistent: false }, (_event, filename) => {
-        if (filename === path.basename(stateFile)) {
-          pollState();
-        }
-      });
-    } catch {
-      this.log.appendLine('[hooks] fs.watch on /tmp failed, falling back to polling');
+    // On Windows %TEMP% is too busy for fs.watch — polling at 1s is sufficient.
+    if (!IS_WINDOWS) {
+      try {
+        this.hooksWatcher = fs.watch(path.dirname(stateFile), { persistent: false }, (_event, filename) => {
+          if (filename === path.basename(stateFile)) {
+            pollState();
+          }
+        });
+      } catch {
+        this.log.appendLine('[hooks] fs.watch on state dir failed, falling back to polling');
+      }
     }
 
     this.scanInterval = setInterval(pollState, 1000);
diff --git a/src/hooksInstaller.ts b/src/hooksInstaller.ts
index 298cec0..acf6a0e 100644
--- a/src/hooksInstaller.ts
+++ b/src/hooksInstaller.ts
@@ -6,7 +6,12 @@ import * as vscode from 'vscode';
 const HOOKS_DIR = path.join(os.homedir(), '.cursor');
 const HOOKS_JSON = path.join(HOOKS_DIR, 'hooks.json');
 const HOOK_MARKER = 'cursor-office-hook';
-const STATE_FILE = '/tmp/cursor-office-state.json';
+
+const IS_WINDOWS = os.platform() === 'win32';
+
+const STATE_FILE = IS_WINDOWS
+  ? path.join(os.tmpdir(), 'cursor-office-state.json')
+  : '/tmp/cursor-office-state.json';
 
 interface HooksConfig {
   version: number;
@@ -14,11 +19,16 @@ interface HooksConfig {
 }
 
 function getHookScriptPath(extensionPath: string): string {
-  return path.join(extensionPath, 'hooks', 'cursor-office-hook.sh');
+  const script = IS_WINDOWS ? 'cursor-office-hook.ps1' : 'cursor-office-hook.sh';
+  return path.join(extensionPath, 'hooks', script);
 }
 
 function buildHookCommand(extensionPath: string): string {
-  return `bash "${getHookScriptPath(extensionPath)}"`;
+  const scriptPath = getHookScriptPath(extensionPath);
+  if (IS_WINDOWS) {
+    return `powershell.exe -NoProfile -ExecutionPolicy Bypass -File "${scriptPath}"`;
+  }
+  return `bash "${scriptPath}"`;
 }
 
 export function isHooksInstalled(): boolean {
@@ -35,6 +45,8 @@ export function getStateFilePath(): string {
   return STATE_FILE;
 }
 
+export { IS_WINDOWS };
+
 export function installHooks(extensionPath: string): { success: boolean; message: string } {
   const hookCmd = buildHookCommand(extensionPath);