1. Download OpenCart installer from here
2. Upload all the files and folders to your server from the "Upload" folder. This can be to anywhere of your choice.
Example as below:
/wwwroot/store or /wwwroot.
3. Rename config-dist.php to config.php and admin/config-dist.php to admin/config.php
4. For Windows make sure the following folders and files permissions allow Read and Write.
5. Make sure you have installed a MySQL Database which has a user assigned to it. (DO NOT USE YOUR ROOT USERNAME AND ROOT PASSWORD).
6. You should be taken to the installer page. Follow the onscreen instructions.
7. Last step, remove installation directory.