I know when I install Windows 7 I have seen the setting change based on the selections I make when I first install Microsoft Update.
During the install of the OS, I tell the install to not configure Windows update.
Once the OS is installed, the first thing I do is go modify the setting "Choose how Windows Installs Updates". The initial setting is "Please select an option". So, I set it to be "Never Check for Updates (not recommended)".
Once I do that, I go back to the main Windows Update screen, and go through the steps to enable "Microsoft Update", so that I can get updates not only for just windows, but for other Microsoft Products as well.
During that process, it asks a question. I forget the exact wording of the screen, but you are presented with two options. Either use Recommended Settings, or something else. I know I select "Use Recommended Settings". This is done from inside an Internet Explorer window, as the process to install Windows Update is done from a web site.
Once I select that option, it finishes the install of Microsoft Update. I then close IE, and go back to Windows Update, which is now in the process of scanning for updates.
Now, this is the important part!
Whatever I did when I installed Microsoft Update changes my settings for Windows update. As I noted, I had it set to "Never Check for Updates (Not Recommended)". However, after I installed Microsoft Update, it is now set to "Install Updates Automatically (Recommended)".
So, I go in and change it right back to what I had it.
But, I do want to point this out, as it shows that when installing Microsoft Update, a choice I made in that did make a change to my Windows Update settings.
So, there may be something similar during the install of MSE that may cause the same change to happen.
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