Vista Install Error: Error Code 0x80070241

I finally got the vista to start installing home premium, but 49% into
copying windows files, i get the message that the source is corrupt (Vista
Install Error: Error Code 0x80070241
) but the dvd was shipped from microsoft so i am sure of its authenticity.
Any help please?.
i'm using Dell Latitude110L 512 RAM & 40GB hard drivei have about 16GB free
space