My wife has a Sony Cybershot DSC-W320 and she has taken a load of photos of my daughter's wedding, which I want to download.

Solution
The camera should have come with a USB cable you could use to connect the camera directly to a PC. The PC should then see the camera as just another hard drive which you should be able to copy and paste from (you may need to install camera drivers onto your PC).

-Wolf sends
The camera should have come with a USB cable you could use to connect the camera directly to a PC. The PC should then see the camera as just another hard drive which you should be able to copy and paste from (you may need to install camera drivers onto your PC).

-Wolf sends
 
Solution
Hi
As above, but if you don't have a cable and there is an SD card in the camera then you could remove the card and put it into a card reader.
 
Try connecting your camera with your computer/laptop using USB cable or remove the SD card & plug it to the card reader & copy paste all the images to your computer.