There are times that I have unusual ways of retrieving information... and this is one of those unusual ways that I have of remembering where to get this nugget that I do on laptops where I'm not sure where exactly they'll be hanging off of. It's probably not what you think. It's not an encryption step, nor is it extra heavy duty security or something, it's a setting to ensure that if I'm not sure what kind of router that Vista will be stuck to, and it's going to be with a non geeky person, that I'm sending it off as proactively as I can to be able to connect to possibly older routers and what not.
Like, for example the Vista laptop that I sent with a partner to the Philippines. Sent it with all the necessary remote access protection, but because I wasn't 100% sure what sort of router he'd be connecting to, I did this command before I sent it off just in case.
So here's the trick of the fastest way I know to find this setting as you know I'm not a command line person at heart and just remember it's netsh interface ...somethingorother....
First, point your browser to Steve Riley's blog. In the search box put in the word "hotel" and voila.... http://blogs.technet.com/steriley/archive/2006/11/21/windows-vista-vs-hotels.aspx
netsh interface tcp set global autotuninglevel=disabled
I'm sure others know better ways to find that information or have that memorized.. but for me... it works as a short cut way to get that info on any laptop that I may not be assured that it's going to be hanging off of modern routing equipment.
P.S. I sent a Vista laptop with a partner who only has XP and had him use it for a week before he left. I showed him UAC before he left but left it turned on and not adjusted to silently elevate in admin approval mode. I left it "as is". I am honestly finding that it's the admins that are the ones that complain the most about UAC. If you explain to the end users what it is, how it works, what to expect and set up the machine so that it really shouldn't be showing up much at all, it's really not as big of a thing as people think in my opinion. It's all in the deployment.