One day my computer came on and said i no longer had an operating system. So i reinstalled. Since then I have been unable to install Java and almost anything else. I get an error message saying all the nessecary files could not be found, doesnt matter if i go direct to the site, use the terminal, package manager , none of it works. I have an older machine , a pIII with only ten g but it did work for a time. any thoughts?