Microsoft promised that Windows 10 would not be pushed out to computers on a Domain, or at least allow you to block the update; a claim which has turned out to be slightly less than accurate.  If you are running a Windows 7 Domain which still relies Microsoft update as opposed to WSUS you may have noticed some serious traffic spikes this morning.  That is because some, perhaps all, of your computers are slurping down the 3GB Windows 10 update.  Check the Register for links to Microsoft and consider blocking Microsoft Update on your firewall until this has been sorted, unless you like a slow network and living dangerously.

"The problem is affecting domain-attached Windows 7 PCs not signed up to Windows Server Update Services (WSUS) for patches and updates, but looking for a Microsoft update instead."

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