diff --git a/.github/scripts/assert-server2012-installer-smoke.ps1 b/.github/scripts/assert-server2012-installer-smoke.ps1
new file mode 100644
index 0000000000..a7518390eb
--- /dev/null
+++ b/.github/scripts/assert-server2012-installer-smoke.ps1
@@ -0,0 +1,75 @@
+[CmdletBinding()]
+param(
+  [Parameter(Mandatory = $true)]
+  [string]$InstallerPath,
+  [int]$StartupSeconds = 20
+)
+
+Set-StrictMode -Version Latest
+$ErrorActionPreference = "Stop"
+
+$os = [System.Environment]::OSVersion.Version
+if ($os.Major -ne 6 -or ($os.Minor -ne 1 -and $os.Minor -ne 3)) {
+  throw "The installer smoke test requires Windows 7 or Server 2012 R2 (kernel 6.1/6.3), detected $($os.ToString())."
+}
+
+$installerPath = (Resolve-Path -LiteralPath $InstallerPath).Path
+$testRoot = Join-Path ([System.IO.Path]::GetTempPath()) "dbx-server2012-installer-smoke"
+$resolvedTemp = (Resolve-Path -LiteralPath ([System.IO.Path]::GetTempPath())).Path.TrimEnd('\')
+$resolvedTestRoot = [System.IO.Path]::GetFullPath($testRoot).TrimEnd('\')
+if (!$resolvedTestRoot.StartsWith("$resolvedTemp\", [System.StringComparison]::OrdinalIgnoreCase)) {
+  throw "Refusing to use a smoke-test directory outside the system temporary directory: $resolvedTestRoot"
+}
+
+if (Test-Path -LiteralPath $resolvedTestRoot) {
+  Remove-Item -LiteralPath $resolvedTestRoot -Recurse -Force
+}
+
+$appProcess = $null
+try {
+  $installer = Start-Process -FilePath $installerPath -ArgumentList @("/S", "/D=$resolvedTestRoot") -Wait -PassThru
+  if ($installer.ExitCode -ne 0) {
+    throw "Server 2012 R2 test installer failed with exit code $($installer.ExitCode)."
+  }
+
+  $appPath = Join-Path $resolvedTestRoot "dbx.exe"
+  $runtimePath = Join-Path $resolvedTestRoot "webview2-fixed-runtime\msedgewebview2.exe"
+  foreach ($requiredPath in @($appPath, $runtimePath)) {
+    if (!(Test-Path -LiteralPath $requiredPath -PathType Leaf)) {
+      throw "Server 2012 R2 installer omitted required file: $requiredPath"
+    }
+  }
+
+  $env:WEBVIEW2_BROWSER_EXECUTABLE_FOLDER = Join-Path $resolvedTestRoot "webview2-fixed-runtime"
+  $env:WEBVIEW2_ADDITIONAL_BROWSER_ARGUMENTS = "--no-sandbox --disable-gpu"
+  $env:DBX_STARTUP_LOG_DIR = Join-Path $resolvedTestRoot "smoke-logs"
+  New-Item -ItemType Directory -Path $env:DBX_STARTUP_LOG_DIR -Force | Out-Null
+
+  $appProcess = Start-Process -FilePath $appPath -PassThru
+  Start-Sleep -Seconds $StartupSeconds
+  $appProcess.Refresh()
+  if ($appProcess.HasExited) {
+    $startupLog = Join-Path $env:DBX_STARTUP_LOG_DIR "startup.log"
+    $logText = if (Test-Path -LiteralPath $startupLog) {
+      Get-Content -LiteralPath $startupLog -Raw
+    } else {
+      "<startup.log was not created>"
+    }
+    throw "DBX exited during the Server 2012 R2 startup smoke test with code $($appProcess.ExitCode).`n$logText"
+  }
+
+  Write-Host "Server 2012 R2 installer smoke test passed after $StartupSeconds seconds: $installerPath"
+}
+finally {
+  if ($null -ne $appProcess -and !$appProcess.HasExited) {
+    Stop-Process -Id $appProcess.Id -Force -ErrorAction SilentlyContinue
+  }
+
+  $uninstallerPath = Join-Path $resolvedTestRoot "uninstall.exe"
+  if (Test-Path -LiteralPath $uninstallerPath -PathType Leaf) {
+    $uninstaller = Start-Process -FilePath $uninstallerPath -ArgumentList @("/S", "_?=$resolvedTestRoot") -Wait -PassThru
+    if ($uninstaller.ExitCode -ne 0) {
+      Write-Warning "Server 2012 R2 test uninstaller returned exit code $($uninstaller.ExitCode)."
+    }
+  }
+}
diff --git a/.github/scripts/assert-webview2-server2012-runtime.ps1 b/.github/scripts/assert-webview2-server2012-runtime.ps1
new file mode 100644
index 0000000000..a0fa0db2fe
--- /dev/null
+++ b/.github/scripts/assert-webview2-server2012-runtime.ps1
@@ -0,0 +1,67 @@
+[CmdletBinding()]
+param(
+  [string]$RuntimeDirectory = (Join-Path $PSScriptRoot "..\..\src-tauri\webview2-fixed-runtime"),
+  [string]$LoaderPath = (Join-Path ([System.IO.Path]::GetTempPath()) "dbx-win7-webview2-loader-probe\WebView2Loader.dll"),
+  [string]$ExpectedVersion = "109.0.1518.78"
+)
+
+Set-StrictMode -Version Latest
+$ErrorActionPreference = "Stop"
+
+$os = [System.Environment]::OSVersion.Version
+if ($os.Major -ne 6 -or ($os.Minor -ne 1 -and $os.Minor -ne 3)) {
+  throw "The offline runtime probe requires Windows 7 or Server 2012 R2 (kernel 6.1/6.3), detected $($os.ToString())."
+}
+
+$runtimeDirectory = (Resolve-Path -LiteralPath $RuntimeDirectory).Path
+$loaderPath = (Resolve-Path -LiteralPath $LoaderPath).Path
+$runtimeExecutable = Join-Path $runtimeDirectory "msedgewebview2.exe"
+if (!(Test-Path -LiteralPath $runtimeExecutable -PathType Leaf)) {
+  throw "WebView2 fixed runtime executable does not exist: $runtimeExecutable"
+}
+
+$escapedLoaderPath = $loaderPath.Replace('"', '""')
+$source = @"
+using System;
+using System.Runtime.InteropServices;
+
+public static class DbxServer2012WebView2Probe
+{
+    [DllImport(@"$escapedLoaderPath", CharSet = CharSet.Unicode, ExactSpelling = true)]
+    public static extern int GetAvailableCoreWebView2BrowserVersionString(
+        string browserExecutableFolder,
+        out IntPtr versionInfo);
+}
+"@
+
+Add-Type -TypeDefinition $source -Language CSharp
+$versionPointer = [IntPtr]::Zero
+$result = [DbxServer2012WebView2Probe]::GetAvailableCoreWebView2BrowserVersionString(
+  $runtimeDirectory,
+  [ref]$versionPointer
+)
+
+$resultHex = [System.BitConverter]::ToUInt32(
+  [System.BitConverter]::GetBytes([int32]$result),
+  0
+)
+$hresult = "0x{0:X8}" -f $resultHex
+if ($result -ne 0) {
+  throw "Server 2012 R2 WebView2 loader rejected the fixed runtime with HRESULT $hresult."
+}
+if ($versionPointer -eq [IntPtr]::Zero) {
+  throw "Server 2012 R2 WebView2 loader returned an empty version pointer."
+}
+
+try {
+  $version = [Runtime.InteropServices.Marshal]::PtrToStringUni($versionPointer)
+}
+finally {
+  [Runtime.InteropServices.Marshal]::FreeCoTaskMem($versionPointer)
+}
+
+if ([string]::IsNullOrWhiteSpace($version) -or !$version.StartsWith($ExpectedVersion)) {
+  throw "Expected WebView2 fixed runtime $ExpectedVersion, detected '$version'."
+}
+
+Write-Host "Server 2012 R2 WebView2 runtime probe passed: loader=$loaderPath runtime=$runtimeDirectory version=$version"
diff --git a/.github/scripts/invoke-server2012-remote-validation.ps1 b/.github/scripts/invoke-server2012-remote-validation.ps1
new file mode 100644
index 0000000000..833e3bee93
--- /dev/null
+++ b/.github/scripts/invoke-server2012-remote-validation.ps1
@@ -0,0 +1,93 @@
+[CmdletBinding(DefaultParameterSetName = "Runtime")]
+param(
+  [Parameter(Mandatory = $true)]
+  [string]$ComputerName,
+  [Parameter(Mandatory = $true)]
+  [string]$UserName,
+  [string]$Password = $env:SERVER2012_PASSWORD,
+  [Parameter(Mandatory = $true)]
+  [ValidateSet("Runtime", "Installer")]
+  [string]$Mode,
+  [Parameter(Mandatory = $true, ParameterSetName = "Runtime")]
+  [string]$RuntimeDirectory,
+  [Parameter(Mandatory = $true, ParameterSetName = "Runtime")]
+  [string]$LoaderPath,
+  [Parameter(Mandatory = $true, ParameterSetName = "Installer")]
+  [string]$InstallerPath,
+  [switch]$UseSsl
+)
+
+Set-StrictMode -Version Latest
+$ErrorActionPreference = "Stop"
+
+if ([string]::IsNullOrWhiteSpace($Password)) {
+  throw "SERVER2012_PASSWORD is required."
+}
+
+$securePassword = ConvertTo-SecureString $Password -AsPlainText -Force
+$credential = New-Object System.Management.Automation.PSCredential($UserName, $securePassword)
+$sessionParameters = @{
+  ComputerName = $ComputerName
+  Credential = $credential
+  Authentication = "Negotiate"
+  ErrorAction = "Stop"
+}
+$useSslEnabled = $UseSsl -or $env:SERVER2012_USE_SSL -eq "true"
+if ($useSslEnabled) {
+  $sessionParameters.UseSSL = $true
+  $sessionParameters.SessionOption = New-PSSessionOption -SkipCACheck -SkipCNCheck -SkipRevocationCheck
+}
+
+$session = $null
+$remoteRoot = "C:\Windows\Temp\dbx-server2012-ci-$([Guid]::NewGuid().ToString('N'))"
+try {
+  $session = New-PSSession @sessionParameters
+  Invoke-Command -Session $session -ScriptBlock {
+    param($Path)
+    New-Item -ItemType Directory -Path $Path -Force | Out-Null
+  } -ArgumentList $remoteRoot
+
+  if ($Mode -eq "Runtime") {
+    $runtimeDirectory = (Resolve-Path -LiteralPath $RuntimeDirectory).Path
+    $loaderPath = (Resolve-Path -LiteralPath $LoaderPath).Path
+    $probeScript = (Resolve-Path -LiteralPath (Join-Path $PSScriptRoot "assert-webview2-server2012-runtime.ps1")).Path
+
+    Copy-Item -LiteralPath $runtimeDirectory -Destination "$remoteRoot\webview2-fixed-runtime" -Recurse -ToSession $session
+    Copy-Item -LiteralPath $loaderPath -Destination "$remoteRoot\WebView2Loader.dll" -ToSession $session
+    Copy-Item -LiteralPath $probeScript -Destination "$remoteRoot\assert-runtime.ps1" -ToSession $session
+
+    Invoke-Command -Session $session -ScriptBlock {
+      param($Root)
+      & "$Root\assert-runtime.ps1" `
+        -RuntimeDirectory "$Root\webview2-fixed-runtime" `
+        -LoaderPath "$Root\WebView2Loader.dll"
+    } -ArgumentList $remoteRoot
+  } else {
+    $installerPath = (Resolve-Path -LiteralPath $InstallerPath).Path
+    $smokeScript = (Resolve-Path -LiteralPath (Join-Path $PSScriptRoot "assert-server2012-installer-smoke.ps1")).Path
+
+    Copy-Item -LiteralPath $installerPath -Destination "$remoteRoot\installer.exe" -ToSession $session
+    Copy-Item -LiteralPath $smokeScript -Destination "$remoteRoot\assert-installer.ps1" -ToSession $session
+
+    Invoke-Command -Session $session -ScriptBlock {
+      param($Root)
+      & "$Root\assert-installer.ps1" -InstallerPath "$Root\installer.exe"
+    } -ArgumentList $remoteRoot
+  }
+}
+finally {
+  if ($null -ne $session) {
+    Invoke-Command -Session $session -ScriptBlock {
+      param($Path)
+      $windowsTemp = [System.IO.Path]::GetFullPath("C:\Windows\Temp").TrimEnd('\')
+      $resolvedPath = [System.IO.Path]::GetFullPath($Path).TrimEnd('\')
+      if (!$resolvedPath.StartsWith("$windowsTemp\dbx-server2012-ci-", [System.StringComparison]::OrdinalIgnoreCase)) {
+        throw "Refusing to clean an unexpected remote validation directory: $resolvedPath"
+      }
+      if (Test-Path -LiteralPath $resolvedPath) {
+        Remove-Item -LiteralPath $resolvedPath -Recurse -Force
+      }
+    } -ArgumentList $remoteRoot
+    Remove-PSSession $session
+  }
+}
diff --git a/.github/scripts/prepare-webview2-win7-loader.ps1 b/.github/scripts/prepare-webview2-win7-loader.ps1
index 723fe1f64a..4c7df3cefb 100644
--- a/.github/scripts/prepare-webview2-win7-loader.ps1
+++ b/.github/scripts/prepare-webview2-win7-loader.ps1
@@ -4,11 +4,16 @@ param()
 Set-StrictMode -Version Latest
 $ErrorActionPreference = "Stop"
 
-# Newer WebView2 static loaders import EventSetInformation, which does not exist on Windows 7.
-# The loader entry points are stable, so the Win7 bundle uses the last verified compatible SDK loader.
-$sdkVersion = "1.0.1054.31"
-$sdkPackageSha256 = "0afe683aa3d143a5f6330db1ce833c69278b38fe5e1eadec52f26910ad26e22f"
-$loaderSha256 = "76314119685bbf4c2b2423a44e81b57beadc914c943d0e772fd6bc78c8e6b0e8"
+# WebView2 static loaders newer than SDK 1.0.1054 import EventSetInformation, which does
+# not exist on Windows 7, while 1.0.1054.31 itself fails on Server 2012 R2 with
+# ERROR_NOT_SUPPORTED (0x80070032, MicrosoftEdge/WebView2Feedback#2025). SDK 1.0.902.49 is
+# the loader verified on both Windows 7 SP1 and Server 2012 R2 real machines, so the single
+# win7 + server 2012 r2 offline bundle links it instead of the webview2-com-sys default.
+$sdkVersion = "1.0.902.49"
+$sdkPackageSha256 = "b483c906b03690267108f4304d456eac0e718131ef994e69aaa5a21532b512c6"
+$loaderSha256 = "aa5c26670f1b18d0fa2a56ac3f1ae30110c332a8bfbd555a7be3e548d1b0da3d"
+$loaderDllSha256 = "fdf978ba706578b05967d7f0181f462147864a5aa74f36016a62cb3d3dbe6909"
+$legacy1054LoaderSha256 = "76314119685bbf4c2b2423a44e81b57beadc914c943d0e772fd6bc78c8e6b0e8"
 $webView2ComSysVersion = "0.38.2"
 $upstreamLoaderSha256 = "0659b741bde6348d4c4a6ec4ceb9af50e3d0048ed9cd3c8659bccbb61fde55ee"
 
@@ -19,9 +24,10 @@ $extractedPath = Join-Path $temporaryRoot "extracted"
 
 try {
   New-Item -ItemType Directory -Path $extractedPath -Force | Out-Null
+  [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
 
   $packageUrl = "https://www.nuget.org/api/v2/package/Microsoft.Web.WebView2/$sdkVersion"
-  Write-Host "Downloading WebView2 SDK $sdkVersion for the Windows 7 loader..."
+  Write-Host "Downloading WebView2 SDK $sdkVersion for the Windows 7 / Server 2012 R2 loader..."
   Invoke-WebRequest -Uri $packageUrl -OutFile $packagePath -UseBasicParsing
 
   $actualPackageSha256 = (Get-FileHash -LiteralPath $packagePath -Algorithm SHA256).Hash.ToLowerInvariant()
@@ -44,7 +50,12 @@ try {
 
   $actualLoaderSha256 = (Get-FileHash -LiteralPath $legacyLoader -Algorithm SHA256).Hash.ToLowerInvariant()
   if ($actualLoaderSha256 -ne $loaderSha256) {
-    throw "Unexpected Windows 7 WebView2 loader SHA256: $actualLoaderSha256"
+    throw "Unexpected Windows 7 / Server 2012 R2 WebView2 loader SHA256: $actualLoaderSha256"
+  }
+
+  $actualLoaderDllSha256 = (Get-FileHash -LiteralPath $legacyLoaderDll -Algorithm SHA256).Hash.ToLowerInvariant()
+  if ($actualLoaderDllSha256 -ne $loaderDllSha256) {
+    throw "Unexpected Windows 7 / Server 2012 R2 WebView2 loader DLL SHA256: $actualLoaderDllSha256"
   }
 
   Push-Location $repositoryRoot
@@ -78,7 +89,7 @@ try {
   }
 
   $existingLoaderSha256 = (Get-FileHash -LiteralPath $loaderDestination -Algorithm SHA256).Hash.ToLowerInvariant()
-  $knownLoaderHashes = @($upstreamLoaderSha256, $loaderSha256)
+  $knownLoaderHashes = @($upstreamLoaderSha256, $legacy1054LoaderSha256, $loaderSha256)
   if ($existingLoaderSha256 -notin $knownLoaderHashes) {
     throw "Refusing to replace an unknown webview2-com-sys loader SHA256: $existingLoaderSha256"
   }
@@ -96,7 +107,7 @@ try {
   $probeLoader = Join-Path $probeDirectory "WebView2Loader.dll"
   Copy-Item -LiteralPath $legacyLoaderDll -Destination $probeLoader -Force
 
-  Write-Host "Prepared WebView2 SDK $sdkVersion static loader for Windows 7: $loaderDestination"
+  Write-Host "Prepared WebView2 SDK $sdkVersion static loader for Windows 7 / Server 2012 R2: $loaderDestination"
   Write-Host "Prepared WebView2 SDK $sdkVersion loader probe DLL: $probeLoader"
 }
 finally {
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 2ce58c1a85..93bfe2a592 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -619,7 +619,7 @@ jobs:
           VSIGN_OPERATOR_PWD: ${{ secrets.VSIGN_OPERATOR_PWD }}
         run: ./.github/scripts/setup-vsign.ps1
 
-      - name: Bundle and upload Windows 7 fixed-runtime installer
+      - name: Bundle and upload Windows 7 / Server 2012 R2 fixed-runtime installer
         shell: pwsh
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -628,7 +628,8 @@ jobs:
         run: |
           $version = "${env:GITHUB_REF_NAME}".TrimStart("v")
           $bundleDir = "target/x86_64-win7-windows-msvc/release/bundle/nsis"
-          $offlineName = "DBX_${version}_x64-win7-webview2-109-offline-setup.exe"
+          $offlineName = "DBX_${version}_x64-win7-server2012r2-webview2-109-offline-setup.exe"
+          $checksumName = "${offlineName}.sha256"
           $cargoMetadata = cargo metadata --no-deps --format-version 1 | ConvertFrom-Json
           $appVersion = ($cargoMetadata.packages | Where-Object { $_.name -eq "dbx" } | Select-Object -First 1).version
 
@@ -645,7 +646,7 @@ jobs:
             Sort-Object LastWriteTimeUtc -Descending |
             Select-Object -First 1
           if (!$installer) {
-            Write-Error "Missing Windows 7 fixed-runtime installer in ${bundleDir}"
+            Write-Error "Missing Windows 7 / Server 2012 R2 fixed-runtime installer in ${bundleDir}"
             exit 1
           }
 
@@ -653,7 +654,10 @@ jobs:
           ./.github/scripts/assert-authenticode.ps1 -Path $installer.FullName
 
           Copy-Item $installer.FullName $offlineName -Force
-          gh release upload "${env:GITHUB_REF_NAME}" $offlineName --repo "${env:GITHUB_REPOSITORY}" --clobber
+          $hash = (Get-FileHash -LiteralPath $offlineName -Algorithm SHA256).Hash.ToLowerInvariant()
+          "$hash  $offlineName" | Set-Content -LiteralPath $checksumName -Encoding ascii
+          gh release upload "${env:GITHUB_REF_NAME}" $offlineName $checksumName `
+            --repo "${env:GITHUB_REPOSITORY}" --clobber
 
       - name: Remove temporary VSign files
         if: always()
diff --git a/.github/workflows/windows-server-2012-r2.yml b/.github/workflows/windows-server-2012-r2.yml
new file mode 100644
index 0000000000..7dd753d9aa
--- /dev/null
+++ b/.github/workflows/windows-server-2012-r2.yml
@@ -0,0 +1,143 @@
+name: Windows Server 2012 R2 Offline Compatibility
+
+on:
+  workflow_dispatch:
+    inputs:
+      run_remote_smoke_test:
+        description: Run the optional WinRM smoke test after building
+        required: true
+        default: false
+        type: boolean
+
+permissions:
+  contents: read
+
+concurrency:
+  group: windows-server-2012-r2-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  CARGO_INCREMENTAL: "0"
+  RUSTFLAGS: -C debuginfo=line-tables-only -C target-feature=+crt-static
+
+jobs:
+  build-win7-server2012r2-offline:
+    name: Build Win7 / Server 2012 R2 Offline Installer
+    runs-on: windows-2022
+    timeout-minutes: 90
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v6
+        with:
+          version: 10.27.0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: 22.13.0
+          cache: pnpm
+
+      - name: Install frontend dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Setup Rust compatibility toolchain
+        uses: dtolnay/rust-toolchain@nightly
+        with:
+          toolchain: nightly-2026-07-22
+          components: rust-src
+
+      - name: Prepare WebView2 109 fixed runtime
+        shell: pwsh
+        run: ./.github/scripts/prepare-webview2-win7-runtime.ps1
+
+      - name: Prepare Win7 / Server 2012 R2 WebView2 loader
+        shell: pwsh
+        run: ./.github/scripts/prepare-webview2-win7-loader.ps1
+
+      - name: Build frontend
+        run: pnpm build
+
+      - name: Build DBX compatibility binary
+        shell: pwsh
+        run: |
+          $env:TAURI_CONFIG = Get-Content src-tauri/tauri.webview2-win7-fixed.conf.json -Raw
+          cargo build --locked --package dbx --release --features custom-protocol --target x86_64-win7-windows-msvc -Z build-std=std,panic_abort
+
+      - name: Audit compatibility PE imports
+        shell: pwsh
+        run: ./.github/scripts/assert-win7-pe-compat.ps1 -BinaryPath target/x86_64-win7-windows-msvc/release/dbx.exe
+
+      - name: Bundle Win7 / Server 2012 R2 offline installer
+        shell: pwsh
+        run: |
+          $bundleDir = "target/x86_64-win7-windows-msvc/release/bundle/nsis"
+          pnpm tauri bundle --bundles nsis --target x86_64-win7-windows-msvc `
+            --config src-tauri/tauri.webview2-win7-fixed.conf.json
+          $installer = Get-ChildItem $bundleDir -Filter "*.exe" |
+            Sort-Object LastWriteTimeUtc -Descending |
+            Select-Object -First 1
+          if (!$installer) {
+            throw "Missing Win7 / Server 2012 R2 fixed-runtime installer in $bundleDir"
+          }
+          Copy-Item -LiteralPath $installer.FullName `
+            -Destination "DBX_${{ github.sha }}_x64-win7-server2012r2-webview2-109-offline-setup.exe" `
+            -Force
+
+      - name: Audit installer contents
+        shell: pwsh
+        run: |
+          $installer = Get-ChildItem -Filter "DBX_*_x64-win7-server2012r2-webview2-109-offline-setup.exe" |
+            Select-Object -First 1
+          ./.github/scripts/assert-win7-installer-content.ps1 -InstallerPath $installer.FullName
+
+      - name: Upload Win7 / Server 2012 R2 test installer
+        uses: actions/upload-artifact@v4
+        with:
+          name: DBX-win7-server2012r2-offline-test
+          path: DBX_*_x64-win7-server2012r2-webview2-109-offline-setup.exe
+          if-no-files-found: error
+          retention-days: 7
+
+  smoke-test-on-server-2012-r2:
+    name: Smoke Test Installer on Server 2012 R2
+    if: ${{ inputs.run_remote_smoke_test }}
+    needs: build-win7-server2012r2-offline
+    runs-on: [self-hosted, Windows, X64, server-2012-r2-controller]
+    environment: windows-server-2012-r2-testing
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Download test installer
+        uses: actions/download-artifact@v5
+        with:
+          name: DBX-win7-server2012r2-offline-test
+          path: installer
+
+      - name: Install and start DBX on Server 2012 R2
+        shell: pwsh
+        env:
+          SERVER2012_HOST: ${{ secrets.SERVER2012_HOST }}
+          SERVER2012_USERNAME: ${{ secrets.SERVER2012_USERNAME }}
+          SERVER2012_PASSWORD: ${{ secrets.SERVER2012_PASSWORD }}
+          SERVER2012_USE_SSL: ${{ vars.SERVER2012_USE_SSL }}
+        run: |
+          $installer = Get-ChildItem installer -Filter "*.exe" | Select-Object -First 1
+          if (!$installer) {
+            throw "The Win7 / Server 2012 R2 installer artifact is missing."
+          }
+          ./.github/scripts/invoke-server2012-remote-validation.ps1 `
+            -ComputerName $env:SERVER2012_HOST `
+            -UserName $env:SERVER2012_USERNAME `
+            -Mode Installer `
+            -InstallerPath $installer.FullName
+
+      - name: Upload verified Win7 / Server 2012 R2 installer
+        uses: actions/upload-artifact@v4
+        with:
+          name: DBX-win7-server2012r2-offline-verified
+          path: installer/*.exe
+          if-no-files-found: error
+          retention-days: 14
diff --git a/docs/lib/downloadLinks.test.ts b/docs/lib/downloadLinks.test.ts
index 1f0204339f..1ce177ca3a 100644
--- a/docs/lib/downloadLinks.test.ts
+++ b/docs/lib/downloadLinks.test.ts
@@ -25,10 +25,10 @@ test("Windows downloads include standard, offline, and Windows 7 installers", ()
       },
       {
         id: "windows-7-offline",
-        label: "Windows 7 离线安装包",
+        label: "Windows 7 / Server 2012 R2 离线安装包",
         description: "内置 WebView2 109 · 仅支持 x64",
         badge: "旧系统",
-        href: "https://dl.dbxio.com/releases/v0.5.82/DBX_0.5.82_x64-win7-webview2-109-offline-setup.exe?v=0.5.82",
+        href: "https://dl.dbxio.com/releases/v0.5.82/DBX_0.5.82_x64-win7-server2012r2-webview2-109-offline-setup.exe?v=0.5.82",
       },
     ],
   );
diff --git a/docs/lib/downloadLinks.ts b/docs/lib/downloadLinks.ts
index afd8f57c19..9259adec2c 100644
--- a/docs/lib/downloadLinks.ts
+++ b/docs/lib/downloadLinks.ts
@@ -52,10 +52,10 @@ const downloadArtifacts: DownloadArtifact[] = [
   {
     id: "windows-7-offline",
     iconId: "windows",
-    labels: { en: "Windows 7 offline installer", cn: "Windows 7 离线安装包" },
+    labels: { en: "Windows 7 / Server 2012 R2 offline installer", cn: "Windows 7 / Server 2012 R2 离线安装包" },
     descriptions: { en: "Includes WebView2 109 · x64 only", cn: "内置 WebView2 109 · 仅支持 x64" },
     badges: { en: "Legacy", cn: "旧系统" },
-    suffix: "x64-win7-webview2-109-offline-setup.exe",
+    suffix: "x64-win7-server2012r2-webview2-109-offline-setup.exe",
   },
   {
     id: "linux",
diff --git a/vendor/wry/src/webview2/mod.rs b/vendor/wry/src/webview2/mod.rs
index 5158141f86..60041d5017 100644
--- a/vendor/wry/src/webview2/mod.rs
+++ b/vendor/wry/src/webview2/mod.rs
@@ -1913,7 +1913,13 @@ pub fn platform_webview_version() -> Result<String> {
 
 fn configured_browser_executable_folder() -> Option<HSTRING> {
   let folder = std::env::var_os("WEBVIEW2_BROWSER_EXECUTABLE_FOLDER");
-  browser_executable_folder_from(folder.as_deref(), cfg!(target_vendor = "win7"))
+  let version = windows_version::OsVersion::current();
+  let fixed_runtime_enabled = should_use_fixed_runtime(
+    cfg!(target_vendor = "win7"),
+    version.major,
+    version.minor,
+  );
+  browser_executable_folder_from(folder.as_deref(), fixed_runtime_enabled)
 }
 
 /// Builds a structured [`WebView2ProcessFailedInfo`] from the WebView2 event
@@ -2058,6 +2064,21 @@ fn browser_executable_folder_from(
 mod tests {
   use super::*;
 
+  #[test]
+  fn win7_target_uses_fixed_runtime_on_windows_7() {
+    assert!(should_use_fixed_runtime(true, 6, 1));
+  }
+
+  #[test]
+  fn compatibility_target_uses_fixed_runtime_on_server_2012_r2() {
+    assert!(should_use_fixed_runtime(true, 6, 3));
+  }
+
+  #[test]
+  fn standard_windows_target_uses_system_runtime_on_windows_7() {
+    assert!(!should_use_fixed_runtime(false, 6, 1));
+  }
+
   #[test]
   fn missing_or_empty_browser_folder_uses_system_runtime() {
     assert!(browser_executable_folder_from(None, true).is_none());
@@ -2154,6 +2175,12 @@ mod tests {
 #[inline]
 fn is_windows_7() -> bool {
   let v = windows_version::OsVersion::current();
-  // windows 7 is 6.1
+  // Windows 7 的内核版本是 6.1。
   v.major == 6 && v.minor == 1
 }
+
+fn should_use_fixed_runtime(is_win7_target: bool, os_major: u32, os_minor: u32) -> bool {
+  // Windows 7 与 Server 2012 R2 专用离线包都必须使用随包 Runtime，
+  // 避免旧系统依赖机器级 Evergreen 注册状态。
+  is_win7_target && os_major == 6 && matches!(os_minor, 1 | 3)
+}