try https://www.howtogeek.com/184374/how-to-fix-the-windows-installer…

…-service-could-not-be-accessed-error-in-windows-7/
web-platform-tests · Nov 30, 2018 · 8f07f9d · 8f07f9d
1 parent 167a304
commit 8f07f9d
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/.azure-pipelines.yml b/.azure-pipelines.yml
@@ -101,6 +101,12 @@ jobs:
   - template: tools/ci/azure/checkout.yml
   - script: systeminfo
     displayName: 'Show system info'
+  - script: |
+      %windir%\system32\msiexec.exe /unregister
+      %windir%\system32\msiexec.exe /regserver
+      %windir%\syswow64\msiexec.exe /unregister
+      %windir%\syswow64\msiexec.exe /regserver
+  - bash: which msiexec
   - script: msiexec /i python-2.7.15.amd64.msi
 
 - job: toolsdir_win2016