I get this same error. I was working on an old XP partition which had a pile of legacy. I when and bought Windows7 Ultimate, did a clean install, and just installed WAMP and I still get the “You appear to have already installed WordPress. To reinstall please clear your old database tables first”
This is not possible and there’s only the OS and WAMP???? I don’t even have MSOffice installed. The WAMP and WordPress install file were downloaded today.
I tried all the suggestion for prefix_table tag, when I browse to my localhost I see the DB I listed in the “My Project” on the localhost page from the wp-config file but when I select the db I get “Error establishing a database connection”.
I do not know what to do?