Windows 10 updates: KB4535996

Do not install Update the windows update  KB4535996. I installed it on my laptop, and it had trouble starting and slowed it to a crawl. I had to remove it to get my laptop back to normal.

  https://www.forbes.com/sites/gordonkelly/2020/03/07/microsoft-windows-10-warning-crashes-boot-audio-slowdown-problems-upgrade-windows-10-free/#7aa37e8c641f