title: Visual Studio Installer 2019 Community 16.9 crash
body: <p>During update Visual Studio 2019 to latest version (16.9), setup failed. Stupidly I closed installer window without read the error.
  When I retryed the update, the Installer crashes few seconds after start.
  I have uninstalled wholly Visual Studio, but Installer still crash.
  I think something is left dirty after first update fail, I tried to search in log files recoverd by collect.exe tools, but I can't found usefull information in that bilions of messages.
  Reinstalling Windows must be the last choice, there is a way to take crash error for undertand the problem and search for a solution?</p>
  <p><strong>EDIT</strong></p>
  <p>Also InstallCleanup.exe don't solve the problem</p>