1. The CD is scratched or dirty.
2. The files are corrupted some how, possibly by the disc being scratched OR if its a fake/burned CD.
If all else fails, try the following:
Put the disc in, exit the auto start menu.
Go to My Computer, and right click on the Disc drive, and press "Explore".
Press Cntrl+A and copy everything. Then move it and paste it somewhere on your computer (Make a folder and put it there)
This might take about 30 minutes...
Now go to the folder after its done copying and press Install. Make sure the CD is in also. See if it works.