diff --git a/.github/SSLcom-sandbox.crt b/.github/SSLcom-sandbox.crt
new file mode 100644
index 00000000..84a7d867
--- /dev/null
+++ b/.github/SSLcom-sandbox.crt
@@ -0,0 +1,35 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/.github/workflows/build_and_test.yaml b/.github/workflows/build_and_test.yaml
index c0874163..469bd918 100644
--- a/.github/workflows/build_and_test.yaml
+++ b/.github/workflows/build_and_test.yaml
@@ -82,14 +82,25 @@ jobs:
                       artifact: linux-arm64-sqlcipher-static
                       executable: "/opt/Element/element-desktop"
                       prepare_cmd: "sudo apt-get -qq update && sudo apt install -y ./dist/*.deb"
-                    - name: Windows (x86)
+                    - name: Windows (x86) Squirrel
                       os: windows-2022
                       artifact: win-ia32
                       executable: "./dist/win-ia32-unpacked/Element.exe"
-                    - name: Windows (x64)
+                    - name: Windows (x86) MSI
+                      os: windows-2022
+                      artifact: win-ia32
+                      executable: "C:/Program Files (x86)/Element/Element*.exe"
+                      prepare_cmd: "msiexec ./dist/Element*.msi"
+                    - name: Windows (x64) Squirrel
                       os: windows-2022
                       artifact: win-x64
-                      executable: "./dist/win-unpacked/Element.exe"
+                      executable: "%LOCALAPPDATA%/element-desktop*/Element.exe"
+                      prepare_cmd: "./dist/squirrel-windows*/Element Setup*.exe"
+                    - name: Windows (x64) MSI
+                      os: windows-2022
+                      artifact: win-x64
+                      executable: "C:/Program Files/Element/Element*.exe"
+                      prepare_cmd: "msiexec ./dist/Element*.msi"
         name: Test ${{ matrix.name }}
         runs-on: ${{ matrix.os }}
         steps:
diff --git a/.github/workflows/build_linux.yaml b/.github/workflows/build_linux.yaml
index 51e99d88..62f1f137 100644
--- a/.github/workflows/build_linux.yaml
+++ b/.github/workflows/build_linux.yaml
@@ -182,3 +182,10 @@ jobs:
                       dist
                       !dist/*-unpacked/**
                   retention-days: 1
+
+            - name: Assert all required files are present
+              run: |
+                  test -f ./dist/element-desktop*$ARCH.deb
+                  test -f ./dist/element-desktop*.tar.gz
+              env:
+                  ARCH: ${{ inputs.arch }}
diff --git a/.github/workflows/build_macos.yaml b/.github/workflows/build_macos.yaml
index b1b423eb..5035aae0 100644
--- a/.github/workflows/build_macos.yaml
+++ b/.github/workflows/build_macos.yaml
@@ -143,3 +143,8 @@ jobs:
                       dist
                       !dist/mac-universal/**
                   retention-days: 1
+
+            - name: Assert all required files are present
+              run: |
+                  test -f ./dist/Element*.dmg
+                  test -f ./dist/Element*-mac.zip
diff --git a/.github/workflows/build_windows.yaml b/.github/workflows/build_windows.yaml
index 1802beff..54149fcc 100644
--- a/.github/workflows/build_windows.yaml
+++ b/.github/workflows/build_windows.yaml
@@ -174,10 +174,20 @@ jobs:
               run: |
                   yarn electron-builder --publish never -w ${{ steps.config.outputs.build-args }}
 
+            - name: Trust eSigner sandbox cert
+              if: inputs.sign == ''
+              run: |
+                  Set-StrictMode -Version 'Latest'
+                  Import-Certificate -CertStoreLocation Cert:\LocalMachine\Root -FilePath .github/SSLcom-sandbox.crt
+
             - name: Check app was signed successfully
               if: inputs.sign
               run: |
-                  . "$env:SIGNTOOL_PATH" verify /pa (get-item ./dist/squirrel-windows*/*.exe)
+                  Set-StrictMode -Version 'Latest'
+                  Get-ChildItem `
+                  -Recurse dist `
+                  -Include *.exe, *.msi `
+                  | ForEach-Object -Process {. 'C:\Program Files (x86)\Windows Kits\10\bin\10.0.22000.0\x64\signtool.exe' verify /pa $_.FullName; if(!$?) { throw }}
 
             - name: Upload Artifacts
               uses: actions/upload-artifact@v4
@@ -186,3 +196,11 @@ jobs:
                   path: |
                       dist
                   retention-days: 1
+
+            - name: Assert all required files are present
+              run: |
+                  Test-Path './dist/win-*unpacked/Element*.exe'
+                  Test-Path './dist/squirrel-windows*/Element Setup*.exe'
+                  Test-Path './dist/squirrel-windows*/element-desktop-*-full.nupkg'
+                  Test-Path './dist/squirrel-windows*/RELEASES'
+                  Test-Path './dist/Element*.msi'