On an old Windows XP machine srunning SP3, the .NET framework updates provided by MicrosoftUpdate.
One of the affected updates was An update is available for the .NET Framework 2.0 SP2 on Windows XP and Windows Server 2003: June 2013.
It would throw errors 0x643 (also known as 0x80070643) when installing, even after a clean reboot. Read the rest of this entry »