Connect the phone to your PC. Ensure that your phone is turned on.
Go to 'Computer' on your PC and double-click on the icon for your mobile phone.
Investigate the folders on your phone (just as you would explore folders on a USB memory stick) to find out where it stores your photos. (Don't worry if they're not in 'Camera', 'Gallery' or whatever. They're just as likely to be in a folder called 'DCIM', or similar).
Then drag-and-drop, or copy-and-paste, the files from your phone to your PC.