I've just moved the thread to Linux - General. It looks it fits better here. Member Intro is a good place to say 'hello', but questions should be posted to other forums.
I agree with XavierP. Check if the cd is broken. The Windows program I recommend to check the images (if you downlaaded them yourself) is md5summer (www.md5summer.org
). After calculating the sum of your image, compare it with the one you can get from the site you downladed it from (in the same directory, usually MD5SUM file). If they're different, you need to download again.