diff --git a/.github/workflows/ci-workflow.yml b/.github/workflows/ci-workflow.yml
index 596fb6249..58729192a 100644
--- a/.github/workflows/ci-workflow.yml
+++ b/.github/workflows/ci-workflow.yml
@@ -202,6 +202,14 @@ jobs:
           New-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\FileSystem" -Name "LongPathsEnabled" -Value 1 -PropertyType DWORD -Force
           git config --system core.longpaths true
 
+      - name: Configure Windows Defender exclusions (Windows)
+        if: matrix.platform == 'windows'
+        shell: pwsh
+        run: |
+          Add-MpPreference -ExclusionPath "${{ github.workspace }}"
+          Add-MpPreference -ExclusionPath "D:\c"
+          Add-MpPreference -ExclusionPath "D:\t"
+
       - name: Install uv
         run: pip3 install uv