A disc read error occurred when booting

Hi all ,
How can I pursue the Installation when these error messages flash on the screen?

A Disk read error occurred. Press Ctrl+Alt+Del
I have Asus desktop computer with an old operating system Windows 98 and have to change it to Windows Vista.
My CD installer of Windows Vista is genuine license. After booting the devices in BIOS set up when I inserted and read the CD from the CD ROM after 30 mins of loading the warning message came out.
I repeat the consequences but still that error still exists.
Why the error is came in to think that the installer is copyright? Is it the installer have a problem even if it is the original copy?
Please help everyone.
