What is the .NET Framework, and do I need all these versions?

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thank you for your explanation very simple even a dunce like me can understand it, like your every day talk

Burns

First of all, I must give my sincere thanks to Leo. He has saved me headaches and possible loss of files and/or even my system, time after time...
Regarding .NET Framework:
Starting 10/14/2009, Windows Automatic Update keeps trying to install .NET Framework 1.1 SP1 Security Update (KB953297), every single day, and each time the installation fails.
I checked and I have already installed in my system: v1.0.3705, v1.1.4322, v2.0.50727, v3.0 and v.3.5 and was ready to uninstall them all but the last one, until I came to "ask Leo"... Good thing I did, once again.
My question is, why is this Security Update systematically failing installation? It started around the same time I upgraded to NIS2010.I wonder if it has anything to do with it?
I also feel important to add that on the same date (10/14/2009), .NET Framework 2.0 SP2 Security Update was successfully installed as well as other updates, by the same process of Windows Automatic Updates.
I use Windows Vista Home Premium and the Error Details line for the repeated installation failure states this: Code 643.
What could possibly be the issue?
Thanks a million for any help on this.

converting vb6 codes to vb.net and do i need microsoft .net framework?

Running J# do i need microsoft .net framework

what was the response to the question about the continual attempt to automatically install .NET Framework 1.1 SP1 Security Update after it has all ready been installed. Is there some way I can block this?

In relation to auto updates I have experienced exactly the same as Lin Yu on exactly the same dates. This is the message I got today from the automatic update:- The following updates were not installed "Microsoft .NET Framework 3.5 Service Pack 1 and .NET Framework 3.5 Family Update for .NET versions 2.0 through 3.5 (KB951847) x86
Microsoft .NET Framework 2.0 Service Pack 2 Security Update for Windows 2000, Windows Server 2003, and Windows XP (KB974417". Any ideas on a solution would be great. Thanks.

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