When attempting to run Windows Update or Microsoft Update, it fails with error 0x80243004 or 80243004.
The Automatic Update client requires that the tray icon be managed either by Group Policy, or that it be displayed if not disabled by Group Policy.
To show the Windows Update icon, complete the following steps:
1. In the notification area at the far right hand side of the taskbar, click the Show hidden icons button and then click Customize.
2. In Notification Area Icons, under Icons, scroll down to find Windows Update. Click the drop-down list next to it, click Show icon and notifications and then click OK.
Go to Windows Update and check for updates again. It should now complete as expected.
Translation for error 0x80243004: WU_E_TRAYICON_FAILURE A failure occurred when trying to create an icon in the taskbar notification area.