Windows Update error 0×80240029 occurs when you try to update Windows Defender
When you try to update Microsoft Windows Defender on a computer, you receive an error message that resembles the following:
Error found: Code 0×80240029
This article contains step-by-step methods to try that may help you install the Windows Defender Update.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB2534474.