Oh no problem Llama. .NET, like so many things in the OS, will behave differently from one system to the next, depending on the system configurations.
One question though. Did you check the commit/charge before and after the installation? Explorer loads the .NET DLL's.
You have an ATI card. Ever install Catalyst Control Center? If you did, then you know how devasting an application can be to the overall system performance when using .NET.
.NET allows for a distributed architecture, which simply means applications/utilites/operating system no longer has to be physically located on your local hard drive.
So the application can go out and grab DLL's, exe, scripts, and run them on your computer without you knowing about it. In a properly secured environment, this would be ok, but I cannot consider the Internet such an environment.
Llama, you and I cannot be considered the typical computer user. I notice you have a tendency to post from your perspective, which is definately not the average user perspective. That is not a ding on you, by the way.
I am speculating, but I bet your computer is no where near using the stock installation setup MS provides. I keep one system, at the house, in stock condition just so I can see what the typcial user sees. I have to admit, I do forget how ugly the default setup MS provides is.
Llama, how many other people do you know who could run thier computer without any pop-up blockers, spyware tools, anti-virus software, firewalls, and never, ever have a computer problem?
By the way, nothing wrong with a good challenge. Makes us think outside the box more.