Get an SD card reader. It has a USB connector on one end and you take out the SD Card from the camera and put it in the other end of the reader. Plug it into a USB port on your computer. Open File Explorer, and the SD card will be listed as a drive on your computer. Open the drive and look for a folder labeled DCIM. Your pictures will be in this folder. Select the picture files and copy them to the location you want on your computer. No other software needed. If you want to touchup, crop or manipulate the photos, then you'll photo editing software, such as Corel Paintshop or Adobe Photoshop.
For viewing photos on your computer, download FastStone Image Viewer - it's free.