DavidFMarks:
To be honest my PIC experience overall wasn't brillaint - frequently found myself poised on the ledges of tall buildings. Boards ppear to be genuine arduino and both work OK on two other computers. Not sure what you mean by "in the installer check all the boards you have". I tried running the IDE from Start menu but no joy
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Arduino does not provides an automated installer, what James is saying to you is the official way to do it, you read how to set the drivers, uncompress the ide, etc
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http://arduino.cc/forum/index.php/topic,118440.0.html this is an unnoficial installer that tries to do everything automatically, this is what I am offering to you
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Install it as any Windows program, at the end of the installation a window will pop asking you about the drivers, it looks like this: http://content.screencast.com/users/erwinried/folders/Jing/media/53fd6e1f-48b3-47f6-8cb9-a3785e6d2129/2012-09-25_1750.png
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You check there the boards you have, after that your arduino should be installed automatically by Windows
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That's all, now open the IDE from the link in the start menu (I try to keep the setup up to date but you should check http://arduino.cc/forum/index.php/topic,118440.0.html once a while to see if there is a new version)