diff --git a/.generated.NoMobile.slnx b/.generated.NoMobile.slnx
index f1cdd99800..d6fd58d14f 100644
--- a/.generated.NoMobile.slnx
+++ b/.generated.NoMobile.slnx
@@ -17,9 +17,6 @@
   <Folder Name="/.github/actions/freediskspace/">
     <File Path=".github/actions/freediskspace/action.yml" />
   </Folder>
-  <Folder Name="/.github/actions/install-zstd/">
-    <File Path=".github/actions/install-zstd/action.yml" />
-  </Folder>
   <Folder Name="/.github/workflows/">
     <File Path=".github/workflows/alpine.yml" />
     <File Path=".github/workflows/build.yml" />
diff --git a/.github/actions/environment/action.yml b/.github/actions/environment/action.yml
index 930d8fa3ea..49b2afb310 100644
--- a/.github/actions/environment/action.yml
+++ b/.github/actions/environment/action.yml
@@ -38,11 +38,6 @@ runs:
         sudo apt-get update
         sudo apt-get install -y gcc-arm-linux-gnueabihf libc6:armhf
 
-    # zstd is needed for cross OS actions/cache but missing from windows-11-arm
-    # https://github.com/actions/partner-runner-images/issues/99
-    - name: Install zstd on Windows ARM64
-      uses: ./.github/actions/install-zstd
-
     # See https://github.com/actions/runner-images/blob/main/images/macos/macos-26-Readme.md#xcode
     # Also https://github.com/dotnet/macios/issues/21762#issuecomment-3424033859 (don't reference symlinks)
     - name: Pin the Xcode Version
diff --git a/.github/actions/install-zstd/action.yml b/.github/actions/install-zstd/action.yml
deleted file mode 100644
index fa103b0ec5..0000000000
--- a/.github/actions/install-zstd/action.yml
+++ /dev/null
@@ -1,36 +0,0 @@
-name: Install zstd on Windows ARM64
-description: |
-  zstd is needed for cross OS actions/cache but missing from windows-11-arm
-  (https://github.com/actions/partner-runner-images/issues/99). Once the issue
-  is resolved, this action can be removed.
-inputs:
-  version:
-    description: 'zstd version'
-    required: false
-    default: '1.5.7'
-  checksum:
-    description: 'zstd checksum'
-    required: false
-    default: 'acb4e8111511749dc7a3ebedca9b04190e37a17afeb73f55d4425dbf0b90fad9'
-
-runs:
-  using: composite
-  steps:
-    - name: Install zstd
-      if: runner.os == 'Windows' && runner.arch == 'ARM64'
-      shell: pwsh
-      env:
-        ZSTD_VERSION: ${{ inputs.version }}
-        ZSTD_CHECKSUM: ${{ inputs.checksum }}
-      run: |
-        $url = "https://github.com/facebook/zstd/releases/download/v$env:ZSTD_VERSION/zstd-v$env:ZSTD_VERSION-win64.zip"
-        $installDir = "$env:RUNNER_TOOL_CACHE\zstd-v$env:ZSTD_VERSION-win64"
-        Invoke-WebRequest -OutFile "$env:TEMP\zstd.zip" -Uri $url
-        $checksum = (Get-FileHash "$env:TEMP\zstd.zip" -Algorithm SHA256).Hash.ToLower()
-        if ($checksum -ne $env:ZSTD_CHECKSUM) {
-          Write-Error "zstd checksum verification failed. Expected: $env:ZSTD_CHECKSUM, Actual: $checksum"
-          exit 1
-        }
-        Expand-Archive -Path "$env:TEMP\zstd.zip" -DestinationPath $env:RUNNER_TOOL_CACHE -Force
-        echo "$installDir" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
-        & "$installDir\zstd.exe" --version
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f8d197d99e..13f0914256 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -52,11 +52,6 @@ jobs:
 
       - run: git submodule update --init modules/sentry-native
 
-      # zstd is needed for cross OS actions/cache but missing from windows-11-arm
-      # https://github.com/actions/partner-runner-images/issues/99
-      - name: Install zstd on Windows ARM64
-        uses: ./.github/actions/install-zstd
-
       - id: cache
         uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
diff --git a/Sentry.slnx b/Sentry.slnx
index f1cdd99800..d6fd58d14f 100644
--- a/Sentry.slnx
+++ b/Sentry.slnx
@@ -17,9 +17,6 @@
   <Folder Name="/.github/actions/freediskspace/">
     <File Path=".github/actions/freediskspace/action.yml" />
   </Folder>
-  <Folder Name="/.github/actions/install-zstd/">
-    <File Path=".github/actions/install-zstd/action.yml" />
-  </Folder>
   <Folder Name="/.github/workflows/">
     <File Path=".github/workflows/alpine.yml" />
     <File Path=".github/workflows/build.yml" />