diff --git a/eng/scripts/KillProcesses.ps1 b/eng/scripts/KillProcesses.ps1
new file mode 100755
index 00000000000..df878a6232c
--- /dev/null
+++ b/eng/scripts/KillProcesses.ps1
@@ -0,0 +1,16 @@
+#!/usr/bin/env pwsh -c
+$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
+iisreset /restart
+
+exit 0
diff --git a/eng/scripts/KillProcesses.sh b/eng/scripts/KillProcesses.sh
new file mode 100755
index 00000000000..f52511739b5
--- /dev/null
+++ b/eng/scripts/KillProcesses.sh
@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+pkill dotnet || true
+exit 0
diff --git a/eng/templates/default-build.yml b/eng/templates/default-build.yml
index 0857f63eb72..d754a4b3e77 100644
--- a/eng/templates/default-build.yml
+++ b/eng/templates/default-build.yml
@@ -80,9 +80,15 @@ jobs:
   - ${{ if eq(parameters.agentOs, 'Windows') }}:
     - script: .\build.cmd -ci /p:SignType=$(_SignType) /p:Configuration=$(BuildConfiguration) $(BuildScriptArgs)
       displayName: Run build.cmd
+    - powershell: eng\scripts\KillProcesses.ps1
+      displayName: Kill processes
+      condition: always()
   - ${{ if ne(parameters.agentOs, 'Windows') }}:
     - script: ./build.sh -ci -p:Configuration=$(BuildConfiguration) $(BuildScriptArgs)
       displayName: Run build.sh
+    - script: eng/scripts/KillProcesses.sh
+      displayName: Kill processes
+      condition: always()
   - task: PublishTestResults@2
     displayName: Publish test results
     condition: always()