Error code

Windows 0x80240034

WINDOWS0x80240034
System Error Code· A POSIX/system errno returned when a system call fails.

What it means

WU_E_DOWNLOAD_FAILED: the update failed to download..

Per dataset:Windows

WU_E_DOWNLOAD_FAILED - Update failed to download..

Per dataset:Windows

How to fix it

  1. Run the Windows Update troubleshooter.
  2. reset the SoftwareDistribution folder.
  3. restart the BITS and Windows Update services.
  4. ensure adequate free disk space.
  5. retry the download.

Not affiliated with Windows. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.