I was recently doing a maintenance window for a customer and had an issue with several of their servers giving me an Error Code 80243004 – Windows Update encountered an unknow error when I was trying to install updates. After researching, I came across an article with a very simple and weird fix for the issue.
- Right click on the taskbar and select Properties.
- Click the Customize… button on the Taskbar and Start Menu Properties window.
- On the Notification Area Icons window, make sure Always show all icons and notifications on the taskbar is checked and click OK.
After turning on the notifications for Windows Update, I was able to successfully install all Windows Updates.