diff --git a/.github/workflows/release-tauri.yml b/.github/workflows/release-tauri.yml
index 55e5ac4c..c5f4099d 100644
--- a/.github/workflows/release-tauri.yml
+++ b/.github/workflows/release-tauri.yml
@@ -212,15 +212,17 @@ jobs:
             }
             "$($t.EnvName)=$dll" | Out-File -FilePath $env:GITHUB_ENV -Append -Encoding utf8
             Write-Host "[ok] built $dll (exported $($t.EnvName))"
-          }
 
-          # bundle.resources 引用的是 src-tauri/openless-ime-payload/x64/OpenLessIme.dll
-          # （仓库里 commit 的是 0 字节占位让 mac 本地 build 也能 resolve）。
-          # Windows CI 这里用真 x64 dll 覆盖占位，让 NSIS / MSI 包装的是真 dll。
-          $payloadDir = Join-Path $appRoot 'src-tauri\openless-ime-payload\x64'
-          New-Item -ItemType Directory -Force -Path $payloadDir | Out-Null
-          Copy-Item -Force -Path $env:OPENLESS_IME_DLL_X64 -Destination (Join-Path $payloadDir 'OpenLessIme.dll')
-          Write-Host "[ok] copied real x64 dll into bundle.resources payload path"
+            # bundle.resources 引用的是 src-tauri/openless-ime-payload/{x64,x86}/OpenLessIme.dll
+            # （仓库里 commit 的是 0 字节占位让 mac 本地 build 也能 resolve）。
+            # 这里用真 dll 覆盖占位，让 NSIS / MSI 都装上真文件；NSIS hook 的 regsvr32
+            # 同时会把 64 / 32 位 COM 注册到 HKLM\Software\Classes\CLSID 的
+            # KEY_WOW64_64KEY / KEY_WOW64_32KEY 两侧（windows_ime_profile.rs 都会查）。
+            $payloadDir = Join-Path $appRoot "src-tauri\openless-ime-payload\$($t.Folder)"
+            New-Item -ItemType Directory -Force -Path $payloadDir | Out-Null
+            Copy-Item -Force -Path $dll -Destination (Join-Path $payloadDir 'OpenLessIme.dll')
+            Write-Host "[ok] copied real $($t.Folder) dll into bundle.resources payload path"
+          }
 
       # ── Windows tauri build：保持 bash shell，因为 PowerShell 调外部命令
       #    会把 '{"bundle":...}' 的内部双引号吃掉、让 tauri 收到无效 JSON。
diff --git a/openless-all/app/src-tauri/installer.nsh b/openless-all/app/src-tauri/installer.nsh
index e3eaf310..cefbcea6 100644
--- a/openless-all/app/src-tauri/installer.nsh
+++ b/openless-all/app/src-tauri/installer.nsh
@@ -5,25 +5,41 @@
 ; "设置 → 权限"页面看到 "Windows 输入法后端：不可用"。
 ;
 ; 这里的 hook 在 NSIS 安装/卸载流程里调 regsvr32 把 OpenLessIme.dll 注册到 HKLM。
-; bundle.resources 把 DLL 拷到 $INSTDIR\tsf-ime\OpenLessIme.dll
+; bundle.resources 把 x64 / x86 DLL 拷到 $INSTDIR\tsf-ime\{x64,x86}\OpenLessIme.dll
 ; (resources map 的 target 必须避开 wxs fragment 已声明的 windows-ime\x64\
 ; 路径，否则 MSI 包里同一路径会被两个 component 占用)。
 ; tauri.conf.json 的 nsis.installMode = "perMachine" 让 NSIS 以管理员身份运行
 ; (写 HKLM 必需)。
 ;
+; 必须同时注册 x64 + x86 两份 dll：windows_ime_profile.rs 的
+; inspect_windows_ime_registration() 会用 KEY_WOW64_64KEY 和 KEY_WOW64_32KEY 两次
+; 检查 HKLM CLSID InprocServer32，少了任何一边都会被判 RegistrationBroken。
+; - x64 用 $SYSDIR\regsvr32.exe (System32 = 64-bit on x64 Windows)
+; - x86 用 $WINDIR\SysWOW64\regsvr32.exe (32-bit regsvr32 → 写 KEY_WOW64_32KEY)
+;
 ; regsvr32 失败时不阻塞安装：用户仍可以靠 SendInput / 粘贴兜底完成上屏。
 
 !macro NSIS_HOOK_POSTINSTALL
-  DetailPrint "Registering OpenLess TSF IME ..."
-  nsExec::ExecToLog '"$SYSDIR\regsvr32.exe" /s "$INSTDIR\tsf-ime\OpenLessIme.dll"'
+  DetailPrint "Registering OpenLess TSF IME (x64) ..."
+  nsExec::ExecToLog '"$SYSDIR\regsvr32.exe" /s "$INSTDIR\tsf-ime\x64\OpenLessIme.dll"'
   Pop $0
   ${If} $0 != 0
-    DetailPrint "OpenLess TSF IME registration failed (exit $0); fallback insertion paths still work."
+    DetailPrint "OpenLess TSF IME x64 registration failed (exit $0); fallback insertion paths still work."
+  ${EndIf}
+
+  DetailPrint "Registering OpenLess TSF IME (x86) ..."
+  nsExec::ExecToLog '"$WINDIR\SysWOW64\regsvr32.exe" /s "$INSTDIR\tsf-ime\x86\OpenLessIme.dll"'
+  Pop $0
+  ${If} $0 != 0
+    DetailPrint "OpenLess TSF IME x86 registration failed (exit $0); fallback insertion paths still work."
   ${EndIf}
 !macroend
 
 !macro NSIS_HOOK_PREUNINSTALL
-  DetailPrint "Unregistering OpenLess TSF IME ..."
-  nsExec::ExecToLog '"$SYSDIR\regsvr32.exe" /s /u "$INSTDIR\tsf-ime\OpenLessIme.dll"'
+  DetailPrint "Unregistering OpenLess TSF IME (x86) ..."
+  nsExec::ExecToLog '"$WINDIR\SysWOW64\regsvr32.exe" /s /u "$INSTDIR\tsf-ime\x86\OpenLessIme.dll"'
+  Pop $0
+  DetailPrint "Unregistering OpenLess TSF IME (x64) ..."
+  nsExec::ExecToLog '"$SYSDIR\regsvr32.exe" /s /u "$INSTDIR\tsf-ime\x64\OpenLessIme.dll"'
   Pop $0
 !macroend
diff --git a/openless-all/app/src-tauri/openless-ime-payload/x86/OpenLessIme.dll b/openless-all/app/src-tauri/openless-ime-payload/x86/OpenLessIme.dll
new file mode 100644
index 00000000..e69de29b
diff --git a/openless-all/app/src-tauri/tauri.conf.json b/openless-all/app/src-tauri/tauri.conf.json
index 031f75e5..f61d699c 100644
--- a/openless-all/app/src-tauri/tauri.conf.json
+++ b/openless-all/app/src-tauri/tauri.conf.json
@@ -80,7 +80,8 @@
       "icons/icon.ico"
     ],
     "resources": {
-      "openless-ime-payload/x64/OpenLessIme.dll": "tsf-ime/OpenLessIme.dll"
+      "openless-ime-payload/x64/OpenLessIme.dll": "tsf-ime/x64/OpenLessIme.dll",
+      "openless-ime-payload/x86/OpenLessIme.dll": "tsf-ime/x86/OpenLessIme.dll"
     },
     "macOS": {
       "minimumSystemVersion": "12.0",