I have NIS 2011 installed on 3 machines, all with valid long term subscriptions.
All are Windows 7, one is 32 bit, two are 64 bit.
Live update stopped working about three days ago on all of them and I haven't had any updates since.
The symptoms are:
I run live update
The "check for updates" finds updates
It starts the update downloads but they are incredibly slow.
Before the download completes live update fails.
It reports that the downloads are complete but they aren't - it's like they time out.
The installations then all report failures.