My W7 recently failed and I did not know what to do. I had this Ubuntu 8.10 CD from Canonical and decided to give it a try. I liked it and installed the 8.10 in my laptop. I am using this now but would like to upgrade to 10.10 since this is not supported anymore.

I've downloaded the ISO file and tried to burn it and follow the instructions on the site. But when I right click the image and write to disc, it says cannot because it cannot read the image file or it is not a valid image file.

Any one knows what to do? or had this similar situation before? Thanks it advance.