Running as Non-Admin (LUA)
http://msmvps.com/bradley/archive/2005/04/26/44743.aspx
Susan says that her kids are running as LUA now... I actually decided it was about time to pull the plug and run as LUA myself last week.
Even though I was sincerely convinced of the benefits of this approach for quite a long time now, I figured out with pain that a lot of things just could not be properly done without privileges. At least until some time ago. It's weird having to say that, but I have always been running as LUA in Linux for example, and only become root when necessary. But in Windows it just wasn't "comfortable" enough... well, it WASN'T.... for now it is. RunAs has got better, and there are many more things you can do as LUA.
Now after the first couple of weeks experiments, there's basically no application that I'm using (and I'm using MANY of them) which doesn't run, and I am not having issues at all. There's a couple of things which you might have got used to do in some way that now you will have to do in another way... but it is entirely possible and not that bad as an experience. Those things that get a bit trickier are those that your average user won't do anyway.
For reference on how to run as Non Admin, or Limited User Account (LUA), there are some resources out there. Best of all, Aaron Margosis's weblog:
http://blogs.msdn.com/Aaron_Margosis/
But this terminology (LUA) is starting to become mainstream, and there are articles appearing here and there, such as this:
"Increasing Security with Limited User Accounts and Restricted Groups" - http://www.WindowSecurity.com/articles/Increasing-Security-Limited-User-Accounts-Restricted-Groups.html