<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> <title></title> </head> <body bgcolor="#ffffff" text="#000066"> G'day there Ashish, <blockquote cite="mid:c309ebfe0808250234p7e2ebdc6x7eea905840e7a366@mail.gmail.com" type="cite"> <pre wrap="">Try a new DVD/CD if you can, possibly after trying to run it on someone else computer to make sure that it is fine. </pre> </blockquote> I tried a couple of DVDs last night. Both discs worked fine on my desktop machine, but had the described symptoms on the laptop. The Ubuntu install DVD booted fine, but wouldn't mount. A couple of music CDs mounted though. Thanks for your advice, but I still don't know what to do to resolve the problem. See ya Ken McLennan </body> </html>