You don't need to install any software if you just want to transfer pictures from your camera to the computer's hard drive.
Buy a Card Reader and plug it into your computer's USB port. Windows will automatically install the driver for it.
Now remove the memory card from your camera and insert it into the appropriate slot on the card reader. A new window should appear and there you will see a folder. Open that folder and your pictures should be in it.
Select all the pictures, right-click and choose "Copy".
Now open the hard drive folder you want to put the pictures into, right-click and choose "Paste".