an iso is a disc image,
it is a type of archive.
just moving or burning the iso in an unpacked state will not work.
you need to burn it to a DVD or CD,
using iso burning software.
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In XP/Vista
1. Download and install Infra Recorder, a free and open-source image-burning program.
Infra Recorder : http://infrarecorder.org/
2. Insert a blank DVD or CD in the drive and select Do nothing or Cancel if an autorun dialog box pops up.
3. Open Infra Recorder and click the 'Write Image' button in the main screen.
* Alternatively you can select the 'Actions' menu, then 'Burn image'.
4. Select the ISO/image file you want to use, then click 'Open'.
5. In the dialog box, click 'OK'.
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In Windows 7
1. Right-click on an ISO image and click on 'Burn disc image'.
.