diff --git a/trans.sh b/trans.sh
index 224c780..10b0ac3 100644
--- a/trans.sh
+++ b/trans.sh
@@ -5629,9 +5629,15 @@ install_windows() {
         fi
     fi
 
+    mkdir -p /wim
+
+    # 挂载 install.wim，检查是否有 sac 组件
+    wimmount "$install_wim" "$image_name" /wim/
+    [ -f /wim/Windows/System32/sacsess.exe ] && has_sac=true || has_sac=false
+    wimunmount /wim/
+
     # 挂载 boot.wim
     info "mount boot.wim"
-    mkdir -p /wim
     wimmountrw /os/boot.wim "$boot_index" /wim/
 
     cp_drivers() {
@@ -5697,6 +5703,11 @@ install_windows() {
         sed -i 's/ForceOldSetup=0/ForceOldSetup=1/i' $system32_dir/startnet.cmd
     fi
 
+    # 有 SAC 组件时，启用 EMS
+    if $has_sac; then
+        sed -i 's/EnableEMS=0/EnableEMS=1/i' $system32_dir/startnet.cmd
+    fi
+
     # Windows Thin PC 有 Windows\System32\winpeshl.ini
     # [LaunchApps]
     # %SYSTEMDRIVE%\windows\system32\drvload.exe, %SYSTEMDRIVE%\windows\inf\sdbus.inf
diff --git a/windows-setup.bat b/windows-setup.bat
index e02c201..d2a965a 100644
--- a/windows-setup.bat
+++ b/windows-setup.bat
@@ -49,9 +49,9 @@ echo list vol | diskpart | find "efi" && (
 )
 
 rem 获取 ProductType
-for /f "tokens=3" %%a in ('reg query "HKLM\SYSTEM\CurrentControlSet\Control\ProductOptions" /v ProductType') do (
-    set "ProductType=%%a"
-)
+rem for /f "tokens=3" %%a in ('reg query "HKLM\SYSTEM\CurrentControlSet\Control\ProductOptions" /v ProductType') do (
+rem     set "ProductType=%%a"
+rem )
 
 rem 获取 BuildNumber
 for /f "tokens=3" %%a in ('reg query "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion" /v CurrentBuildNumber') do (
@@ -155,6 +155,7 @@ for %%a in (RAM TPM SecureBoot) do (
 rem 设置
 set ForceOldSetup=0
 set EnableUnattended=1
+set EnableEMS=0
 
 rem 运行 ramdisk X:\setup.exe 的话
 rem vista 会找不到安装源
@@ -190,9 +191,10 @@ if %BuildNumber% GEQ 26040 if "%ForceOldSetup%"=="0" (
     set ResizeRecoveryPartition=/ResizeRecoveryPartition Disable
 )
 
-rem 为 windows server 打开 EMS
-rem 普通 windows 没有自带 EMS 组件，暂不处理
-if "%ProductType%"=="ServerNT" (
+rem 为 windows server 打开 EMS/SAC
+rem 普通 windows 没有自带 SAC 组件，暂不处理
+rem 现在通过 trans.sh 准确检测系统是否有 SAC 组件，有则修改 EnableEMS 变量打开 EMS
+if "%EnableEMS%"=="1" (
     rem set EMS=/EMSPort:UseBIOSSettings /EMSBaudRate:115200
     set EMS=/EMSPort:COM1 /EMSBaudRate:115200
 )