Trouble installing Wordpress

I have Windows 10. I installed MAMP and proceeded with installing Wordpress on my local computer. For some reason, I'm not able to access the Wordpress dashboard; as I continue to receive an error message that says, it appears you already have Wordpress installed; please try clearing out any old tables (not sure what that's getting at).

Please help, as I've tried at least 4-5 times to install and re-install Wordpress but I'm not sure what I am doing wrong.