Installing arduino 1.0.1

Hi Everyone
Surely it cant be as convoluted as I read it to be, to install ver 1.01 of Arduino.
First I go the message that I needed JDK ver 1.5.0. I installed ver 6 and that stopped that problem.
Now I get the message
“Can not find the main class:processing.app.base Program will exit” See attached
What have I done wrong and am I going to have a lot more problems getting ver 1.0.1 installed?
Is there a simple way of installing this software?
Thank you for reading this post
Please help
Regards

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What OS are you using? Windows, Mac, or Linux. Hard to tell by the popup boxes.

Hi Surfer Tim Windows 7 Regards

Insure you leave the arduino.exe where it is unpacked. If you move the executable, it will throw that error. If you want the Arduino IDE on your desktop, create a shortcut and move the shortcut to your desktop.