On 12/Nov/18 18:18, Clinton Work wrote:

I saw this issue randomly on Windows PCs due to IPV6 TCP checksum offloading.

Try the following on the problem Windows machine:

- Open the Device Manager -> Network Adapters -> Network Interface (Ethernet NIC):

- Under the Network Adapter -> Advanced Tab, disable these options if present:

TCP Checksum Offloading (IPV6) -> Disabled

UDP Checksum Offloading (IPV6) -> Disabled

- Try Windows update again

Thanks, Airdrie, but I don't have those options on the network adapter.

Mark.