IL:2 sturmovik 1946 disc error

[Bobb4]

Unfortunately you have a dud DVD writer. Pure and simple.
Yes it reads the odd disk but not all of them. I am sure you have already noticed this with other disks if not welcome to the club.
Not much you can do about it really.
Your solutions are one of two things.
Connect to another computer and use it's DVD drive, should be simple enought, a friends laptop etc.
or replace the offending DVD writer.
Trust me, if this is the first time it has happened, it will happen again, sooner or later.
Get rid of the piece of junk.
The likelihood of it being the actual disk are zero to none.