diff --git a/.github/workflows/release-tauri.yml b/.github/workflows/release-tauri.yml
index 392250137..0fe0c9e7c 100644
--- a/.github/workflows/release-tauri.yml
+++ b/.github/workflows/release-tauri.yml
@@ -429,21 +429,38 @@ jobs:
         shell: pwsh
         working-directory: 'openless-all/app'
         run: |
-          $nsis = Get-ChildItem "src-tauri\target\release\bundle\nsis\*.exe" -ErrorAction Stop | Select-Object -First 1
-          if (-not $nsis) { throw "NSIS installer not found." }
-          powershell.exe -NoProfile -ExecutionPolicy Bypass -File .\scripts\windows-ime-install-smoke.ps1 -InstallerPath $nsis.FullName -InstallerKind nsis
-          if ($LASTEXITCODE -ne 0) {
-            throw "NSIS installer smoke failed with exit $LASTEXITCODE"
-          }
-          if ($env:OPENLESS_SKIP_WINDOWS_MSI -eq '1') {
-            Write-Host "[ok] Skipping MSI smoke for beta release channel."
-            return
-          }
-          $msi = Get-ChildItem "src-tauri\target\release\bundle\msi\*.msi" -ErrorAction Stop | Select-Object -First 1
-          if (-not $msi) { throw "MSI installer not found." }
-          powershell.exe -NoProfile -ExecutionPolicy Bypass -File .\scripts\windows-ime-install-smoke.ps1 -InstallerPath $msi.FullName -InstallerKind msi
-          if ($LASTEXITCODE -ne 0) {
-            throw "MSI installer smoke failed with exit $LASTEXITCODE"
+          # The disposable runner must not be shut down by MSI Restart Manager
+          # after the NSIS install/uninstall has loaded the TSF DLLs. /norestart
+          # suppresses an OS reboot, not Restart Manager application shutdown.
+          # Keep both real installer/registry checks; restore the machine policy.
+          $policy = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\Installer'
+          $policyName = 'DisableAutomaticApplicationShutdown'
+          $previous = (Get-ItemProperty -LiteralPath $policy -Name $policyName -ErrorAction SilentlyContinue).$policyName
+          try {
+            New-Item -Path $policy -Force | Out-Null
+            New-ItemProperty -LiteralPath $policy -Name $policyName -PropertyType DWord -Value 1 -Force | Out-Null
+            $nsis = Get-ChildItem "src-tauri\target\release\bundle\nsis\*.exe" -ErrorAction Stop | Select-Object -First 1
+            if (-not $nsis) { throw "NSIS installer not found." }
+            powershell.exe -NoProfile -ExecutionPolicy Bypass -File .\scripts\windows-ime-install-smoke.ps1 -InstallerPath $nsis.FullName -InstallerKind nsis
+            if ($LASTEXITCODE -ne 0) {
+              throw "NSIS installer smoke failed with exit $LASTEXITCODE"
+            }
+            if ($env:OPENLESS_SKIP_WINDOWS_MSI -eq '1') {
+              Write-Host "[ok] Skipping MSI smoke for beta release channel."
+              return
+            }
+            $msi = Get-ChildItem "src-tauri\target\release\bundle\msi\*.msi" -ErrorAction Stop | Select-Object -First 1
+            if (-not $msi) { throw "MSI installer not found." }
+            powershell.exe -NoProfile -ExecutionPolicy Bypass -File .\scripts\windows-ime-install-smoke.ps1 -InstallerPath $msi.FullName -InstallerKind msi
+            if ($LASTEXITCODE -ne 0) {
+              throw "MSI installer smoke failed with exit $LASTEXITCODE"
+            }
+          } finally {
+            if ($null -ne $previous) {
+              New-ItemProperty -LiteralPath $policy -Name $policyName -PropertyType DWord -Value $previous -Force | Out-Null
+            } else {
+              Remove-ItemProperty -LiteralPath $policy -Name $policyName -ErrorAction SilentlyContinue
+            }
           }
 
       - name: Disambiguate macOS updater bundle filename
diff --git a/docs/releases/2.0.1-windows-ci-isolation-20261016.md b/docs/releases/2.0.1-windows-ci-isolation-20261016.md
new file mode 100644
index 000000000..74ded0d64
--- /dev/null
+++ b/docs/releases/2.0.1-windows-ci-isolation-20261016.md
@@ -0,0 +1,11 @@
+# 2.0.1 Windows 安装器 CI 隔离
+
+Stable 标签 `v2.0.1-tauri` 固定在 `33d17a4e`，精确源码 CI `38876378343` 及 main CI `38878764285` 均七项通过。macOS 两架构、Android 四 ABI 已构建、下载并核验；不重建这些资产。
+
+桌面 run `38878773775` 两次 Windows job（`116900142784`、`116916344722`）都已生成 NSIS 和数字 MSI 版本的安装包；NSIS 安装、COM/TSF/后端注册检查及卸载通过。两次均在随后的 `msiexec /i ... /qn /norestart` 开始约 1 秒后收到 runner shutdown signal，MSI 检查被取消，未上传 Windows 资产。重复位置排除了继续盲目重跑的价值，符合 MSI Restart Manager 关闭持有 TSF 组件的 runner 进程的现象；日志不把它记录为已通过安装验收。
+
+Microsoft 官方定义 `/norestart` 不等于禁止 Restart Manager 关闭应用。CI 在真实安装器 smoke 之前，临时将 `HKLM\Software\Policies\Microsoft\Windows\Installer` 的 DWORD `DisableAutomaticApplicationShutdown` 设为 1，禁止 Windows Installer 与 Restart Manager 交互，并在 finally 恢复原值/移除本次新增属性。该设置仅存在于可丢弃的 Windows CI 主机，不写入 MSI/NSIS，不改变用户电脑策略，不跳过安装、卸载、DLL 路径或任何 COM/TSF 注册检查。
+
+来源：[DisableAutomaticApplicationShutdown](https://learn.microsoft.com/en-us/windows/win32/msi/disableautomaticapplicationshutdown)、[MSIRESTARTMANAGERCONTROL](https://learn.microsoft.com/en-us/windows/win32/msi/msirestartmanagercontrol)。官方 Markdown 已从 MicrosoftDocs/win32 对应 desktop-src/Msi 文件核对。
+
+工作流与契约经 PR/CI 后，仅使用已存在的管理员/草稿/精确 tag 源码/七项 CI 守卫的 Windows-only repair 入口，对 `v2.0.1-tauri` 构建并验证。应用源码、版本与标签不变；最终仍须 Windows smoke 成功、全部资产与签名核验后才公开 Stable。
diff --git a/openless-all/app/scripts/windows-msi-release-contract.test.mjs b/openless-all/app/scripts/windows-msi-release-contract.test.mjs
index 7badaecdf..ac8b911b4 100644
--- a/openless-all/app/scripts/windows-msi-release-contract.test.mjs
+++ b/openless-all/app/scripts/windows-msi-release-contract.test.mjs
@@ -64,6 +64,17 @@ const publisher = steps.find((s) => s.uses?.startsWith('softprops/action-gh-rele
 assert.equal(publisher.with.tag_name, '${{ env.OPENLESS_RELEASE_TAG }}');
 assert.equal(publisher.with.draft, true);
 assert.ok(steps.find((s) => s.name === 'Confirm repair target remains draft'));
+const smoke = steps.find((s) => s.name === 'Verify Windows installers register TSF IME');
+assert.equal(smoke.if, "matrix.platform == 'windows-latest'");
+assert.match(smoke.run, /DisableAutomaticApplicationShutdown/);
+assert.match(smoke.run, /-PropertyType DWord -Value 1 -Force/);
+assert.ok(smoke.run.indexOf('-Value 1 -Force') < smoke.run.indexOf('-InstallerKind nsis'));
+assert.match(smoke.run, /finally[\s\S]*-Value \$previous[\s\S]*Remove-ItemProperty/);
+for (const kind of ['nsis', 'msi']) {
+  assert.match(smoke.run, new RegExp('-InstallerKind ' + kind));
+  assert.match(smoke.run, new RegExp(kind.toUpperCase() + ' installer smoke failed'));
+}
+assert.doesNotMatch(smoke.run, /continue-on-error|SkipUninstall|exit 0/);
 const schema = JSON.parse(
   readFileSync(
     new URL('../node_modules/@tauri-apps/cli/config.schema.json', import.meta.url),