To fix the 0xC80003FA Windows Update Error, restart Windows Update/BITS service and reset the Update components. If that doesn't help, follow these suggestions.

Microsoft has apologized for the confusion surrounding a Windows update error after the company falsely claimed to have fixed ...

This affects Windows 10 versions 21H2 and 22H2. Some users have reported seeing the error code 0x80070643 with the message "ERROR_INSTALL_FAILURE" when attempting to install this update.

Microsoft has confirmed that Windows 11 Pro to Enterprise upgrade is currently broken even when using a valid subscription. Microsoft believes the issue started with the April Patch Tuesday.

Windows 10 users worldwide report problems installing Microsoft's January Patch Tuesday updates, getting 0x80070643 errors when attempting to install the KB5034441 security update for BitLocker.

At least Microsoft can give the all-clear for the cases currently occurring under Windows 10 22H2, 21H2 and Server 2022. In the Windows Release Health Notes, the Redmond-based company writes that ...