I really need to start from zero and download eclipse again, but before I want to rid of what I already have which is not much. Is there a way to totally clean my pc of eclipse? Thanks
When you installed Eclipse, did it come as a .zip file? If so, you can just delete the folder where you uncompressed the .zip file. (Eclipse generally doesn't require a formal uninstallation routine.) By the way, you can install many different versions of Eclipse on one computer, and they generally won't have any impact on one another (so it's not necessary to uninstall one installation in order to start afresh with another installation).
Don't forget to also delete your workspace, or at least create a new workspace for your new Eclipse installation. Most of your configuration settings go into the workspace.