Windows update 9C48 error installing IE11 (KB2999226)
Windows Server 2008R2 fails to install KB2999226 (Internet Explorer 11) update with error 9C48. IE11 is already present on the system and seems to be functioning fine. All other updates install with no issues.
Windows system logs record Event ID 20 Error:
Installation Failure: Windows failed to install the following update with error 0x80070643: Internet Explorer 11 for Windows Server 2008 R2 for x64-based Systems.