Windows Update Error 80072EFE in Client Hyper-V Guest
Client Hyper-V was one of the things I was most looking forward to when I upgraded to Windows 8. I immediately added the Hyper-V feature and went to installing Server 2008 R2 in the first virtual machine. That went well enough and nothing extraordinary happened until I tried to run Windows Update in the new VM. Try as I might, Windows Update would always fail with the error code 80072EFE. Sometimes it chose to fail with 80072EE2, though.
As documented in a support article, those error codes stand for ERROR_INTERNET_CONNECTION_ABORTED and ERROR_INTERNET_TIMEOUT, respectively. Not too helpful. After searching around for some time I finally found an article that pointed me in the right direction.
As it turned out, Windows Update manages to disrupt the internet connection (not only of the guest, but also of the host):
The reason for that nasty behavior seems to be a bug in the implementation of IP/TCP/UDP offload: after disabling these four settings on the synthetic guest NIC Windows Update worked like a charm:
On Server Core, please look at this:
Searching for hours and nothing helped!
But this is the solution for my problem.
Thank you very much.
bingo – and by the way also solved my activation problem :-) Thanks a lot!
Disabled these and rebooted the VM, to no effect.
Windows 7 in Hyper-V now gets a “Microsoft Virtual Machine Bus Network Adapter”, which might have a different issue than the one described here for “Microsoft Hyper-V Network Adapter”?
Don’t ask why I’m trying to build a 2008 R2 server in 2022, but I ran into this problem and I tried the network changes, but they did not work. However, there is a windows update that fixes this discussed in this thread: