Norton Detects A Virus On Half Life Disc

I own Half Life Generation and I have had it installed on two different PC's which are both running Norton Internet Security. Both times Norton alerted me of a virus and apparently it's coming from the Half Life disc. The 'virus' is coming from the 'Manual' folder and the filename is 'ar40eng'. It says it's the virus 'W95.CIS.damaged'. Is it really a virus? And if it is how did it get onto the disc? I would really appreciate it if somebody could clear things up for me. Thanks.

Norton is normally worse than the virus it protects you from.
slows down your machine causes massive instability problems.
Will infect your machine by checking and unziping spam emails you would normally delete. Will cause programs not to install properly and will cause others to malfunction. Plus I really love it when I am fixing somebodies machine that is full of viruses and norton keep procliaming to me every five seconds how it protecting the computer as I am removing viruses it doesn't see. Any antivirus or spyware program that keeps running instead of scanning and leaving is really a waste of resources.
I have been using computers for thirty something years and never had a virus. Why simple I buy my software and music.

I used to like Norton back in the day before symantic got their paws on it.
I used to run it to chreck my machine. now they are massive bloatware products that clog your machine.

i concur with the Norton remarks, get rid of it. but am utterly surprised no one has offered you a replacement..

These are two FREE antivirus programs and are highly regarded between the IT community as the best antivirus you can get:

AVG: http://free.avg.com/
Avast: http://www.avast.com/eng/avast_4_home.html

try em both, then use the one that you like the most