diff --git a/.azure/pipelines/jobs/default-build.yml b/.azure/pipelines/jobs/default-build.yml
index 2b2663eb1a..825df89f86 100644
--- a/.azure/pipelines/jobs/default-build.yml
+++ b/.azure/pipelines/jobs/default-build.yml
@@ -139,9 +139,15 @@ jobs:
       - ${{ if eq(parameters.agentOs, 'Windows') }}:
         - script: .\$(BuildDirectory)\build.cmd -ci /p:SignType=$(_SignType) /p:Configuration=$(BuildConfiguration) $(BuildScriptArgs)
           displayName: Run build.cmd
+        - powershell: eng\scripts\KillProcesses.ps1
+          displayName: Kill processes
+          condition: always()
       - ${{ if ne(parameters.agentOs, 'Windows') }}:
         - script: ./$(BuildDirectory)/build.sh -ci -p:Configuration=$(BuildConfiguration) $(BuildScriptArgs)
           displayName: Run build.sh
+        - script: eng/scripts/KillProcesses.sh
+          displayName: Kill processes
+          condition: always()
     - ${{ if ne(parameters.buildScript, '') }}:
       - script: $(BuildScript) /p:Configuration=$(BuildConfiguration) $(BuildScriptArgs)
         displayName: run $(BuildScript)
diff --git a/eng/scripts/KillProcesses.ps1 b/eng/scripts/KillProcesses.ps1
new file mode 100644
index 0000000000..29b3657281
--- /dev/null
+++ b/eng/scripts/KillProcesses.ps1
@@ -0,0 +1,16 @@
+$ErrorActionPreference = 'Continue'
+
+taskkill /T /F /IM dotnet.exe
+taskkill /T /F /IM testhost.exe
+taskkill /T /F /IM iisexpress.exe
+taskkill /T /F /IM iisexpresstray.exe
+taskkill /T /F /IM w3wp.exe
+taskkill /T /F /IM msbuild.exe
+taskkill /T /F /IM vbcscompiler.exe
+taskkill /T /F /IM git.exe
+taskkill /T /F /IM vctip.exe
+taskkill /T /F /IM chrome.exe
+taskkill /T /F /IM h2spec.exe
+iisreset /restart
+
+exit 0
diff --git a/eng/scripts/KillProcesses.sh b/eng/scripts/KillProcesses.sh
new file mode 100755
index 0000000000..f52511739b
--- /dev/null
+++ b/eng/scripts/KillProcesses.sh
@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+pkill dotnet || true
+exit 0