diff --git a/AGENT_INSTALL.md b/AGENT_INSTALL.md
index fefb2c6..a637616 100644
--- a/AGENT_INSTALL.md
+++ b/AGENT_INSTALL.md
@@ -6,13 +6,22 @@ extension yourself (Step 3 is the user's job).
 
 ## 1. Install the CLI and skill
 
-Run the install command from [`README.md`](README.md) (macOS/Linux):
+Run the install command from [`README.md`](README.md):
+
+**macOS / Linux:**
 
 ```bash
 curl -fsSL https://raw.githubusercontent.com/Tencent/BrowserSkill/main/install.sh | sh
 bsk install-skill --yes
 ```
 
+**Windows (PowerShell):**
+
+```powershell
+irm https://raw.githubusercontent.com/Tencent/BrowserSkill/main/install.ps1 | iex
+bsk install-skill --yes
+```
+
 ## 2. Run `bsk doctor`
 
 ```bash
diff --git a/README.md b/README.md
index 9bfccbc..6b91ae6 100644
--- a/README.md
+++ b/README.md
@@ -77,9 +77,11 @@ Install the CLI, then install the extension from the [Chrome Web Store](https://
 curl -fsSL https://raw.githubusercontent.com/Tencent/BrowserSkill/main/install.sh | sh
 ```
 
-**Windows**: download `bsk-v<version>-x86_64-pc-windows-msvc.zip` from the
-[latest CLI release](https://github.com/Tencent/BrowserSkill/releases/latest)
-and add the extracted `bsk.exe` to your `PATH`.
+**Windows** (PowerShell — installs to `~/.local/bin`):
+
+```powershell
+irm https://raw.githubusercontent.com/Tencent/BrowserSkill/main/install.ps1 | iex
+```
 
 Verify the binary:
 
diff --git a/install.ps1 b/install.ps1
new file mode 100644
index 0000000..84a10dd
--- /dev/null
+++ b/install.ps1
@@ -0,0 +1,169 @@
+<#
+.SYNOPSIS
+install.ps1 — install the bsk CLI on Windows from GitHub Releases.
+
+.DESCRIPTION
+Downloads the latest (or pinned) bsk release for Windows x64,
+extracts bsk.exe to a user-local directory, and adds it to PATH.
+
+Usage:
+  irm https://raw.githubusercontent.com/Tencent/BrowserSkill/main/install.ps1 | iex
+
+Environment overrides:
+  $env:BSK_REPO         GitHub owner/repo (default: Tencent/BrowserSkill)
+  $env:BSK_VERSION      Pin CLI version (default: latest from version.json)
+  $env:BSK_INSTALL_DIR  Install directory (default: $HOME\.local\bin)
+#>
+
+#Requires -Version 5.1
+
+$ErrorActionPreference = "Stop"
+
+$Repo = if ($env:BSK_REPO) { $env:BSK_REPO } else { "Tencent/BrowserSkill" }
+$InstallDir = if ($env:BSK_INSTALL_DIR) { $env:BSK_INSTALL_DIR } else { Join-Path $HOME ".local\bin" }
+$GitHub = "https://github.com/${Repo}"
+
+function Write-Log {
+    param([string]$Message)
+    Write-Host "==> $Message" -ForegroundColor Cyan
+}
+
+function Write-Die {
+    param([string]$Message)
+    Write-Host "error: $Message" -ForegroundColor Red
+    exit 1
+}
+
+# ── Platform / architecture detection ─────────────────────────────────────────
+
+function Get-PlatformTriple {
+    $arch = [System.Runtime.InteropServices.RuntimeInformation]::ProcessArchitecture
+
+    switch ($arch) {
+        "X64"  { $archId = "x64" }
+        "Arm64" { $archId = "arm64" }
+        default { Write-Die "unsupported architecture: $arch (x64 and ARM64 only)" }
+    }
+
+    $windowsArch = switch ($archId) {
+        "x64"   { "x86_64-pc-windows-msvc" }
+        "arm64" { "aarch64-pc-windows-msvc" }
+    }
+
+    return @{
+        ArchId      = $archId
+        TargetTriple = $windowsArch
+    }
+}
+
+# ── Version resolution ────────────────────────────────────────────────────────
+
+function Get-LatestVersion {
+    $versionJsonUrl = "${GitHub}/releases/latest/download/version.json"
+    Write-Log "fetching latest version from ${versionJsonUrl}"
+
+    try {
+        $version = (Invoke-RestMethod -Uri $versionJsonUrl).version
+        if (-not $version) { Write-Die "could not parse version from version.json" }
+        return $version
+    }
+    catch {
+        Write-Die "failed to fetch version.json: $_"
+    }
+}
+
+# ── PATH helpers ──────────────────────────────────────────────────────────────
+
+function Add-ToUserPath {
+    param([string]$Dir)
+
+    $currentUserPath = [Environment]::GetEnvironmentVariable("PATH", "User") -split ";" | Where-Object { $_ }
+
+    if ($currentUserPath -contains $Dir) {
+        Write-Log "$Dir is already in your user PATH"
+        return
+    }
+
+    $newUserPath = ($currentUserPath + $Dir) -join ";"
+    [Environment]::SetEnvironmentVariable("PATH", $newUserPath, "User")
+    Write-Log "added ${Dir} to user PATH"
+}
+
+function Add-ToSessionPath {
+    param([string]$Dir)
+
+    $pathEntries = $env:PATH -split ";" | Where-Object { $_ }
+    if ($pathEntries -contains $Dir) {
+        return
+    }
+
+    $env:PATH = "$Dir;$env:PATH"
+}
+
+# ── Main ──────────────────────────────────────────────────────────────────────
+
+function Main {
+    $platform = Get-PlatformTriple
+
+    if ($env:BSK_VERSION) {
+        $version = $env:BSK_VERSION -replace '^v', ''
+        Write-Log "using pinned version ${version}"
+    }
+    else {
+        $version = Get-LatestVersion
+        Write-Log "latest version is ${version}"
+    }
+
+    $tag = "cli-v${version}"
+    $archiveName = "bsk-v${version}-$($platform.TargetTriple).zip"
+    $downloadUrl = "${GitHub}/releases/download/${tag}/${archiveName}"
+
+    $tempDir = Join-Path ([System.IO.Path]::GetTempPath()) ([System.IO.Path]::GetRandomFileName())
+    New-Item -ItemType Directory -Path $tempDir -Force | Out-Null
+
+    try {
+        $archivePath = Join-Path $tempDir $archiveName
+
+        Write-Log "downloading ${downloadUrl}"
+        Invoke-WebRequest -Uri $downloadUrl -OutFile $archivePath -UseBasicParsing -ErrorAction Stop
+
+        Write-Log "extracting ${archiveName}"
+        Expand-Archive -Path $archivePath -DestinationPath $tempDir -Force
+
+        if (-not (Test-Path (Join-Path $tempDir "bsk.exe"))) {
+            Write-Die "bsk.exe not found in archive"
+        }
+
+        if (-not (Test-Path $InstallDir)) {
+            New-Item -ItemType Directory -Path $InstallDir -Force | Out-Null
+        }
+
+        Copy-Item -Path (Join-Path $tempDir "bsk.exe") -Destination (Join-Path $InstallDir "bsk.exe") -Force
+
+        Write-Log "installed bsk to $InstallDir\bsk.exe"
+
+        # Add to session PATH (current shell)
+        Add-ToSessionPath $InstallDir
+
+        # Add to user PATH (persistent)
+        Add-ToUserPath $InstallDir
+
+        # Verify
+        $bskPath = Join-Path $InstallDir "bsk.exe"
+        if (Get-Command bsk -ErrorAction SilentlyContinue) {
+            & bsk --version
+        }
+        else {
+            Write-Log "verify install: & ""$bskPath"" --version"
+        }
+
+        Write-Log "done"
+        Write-Host ""
+        Write-Host "Open a new PowerShell window for PATH changes to take full effect."
+    }
+    finally {
+        Remove-Item -Recurse -Force $tempDir -ErrorAction SilentlyContinue
+    }
+}
+
+Main