A long time ago, i've installed odoo and it was working fine until it broke down for some reason. After that i un-installed all the components (postgresql & odoo) and installed the latest version 8 (windows 7), but i got this message when i try to access the local host: "Internal Server Error The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application."

After refreshing the page, it seems like the css is not working, this is what i got: http://i.imgur.com/57ifYIp.jpg