Are you French speaking?
Please give more details tell us what system, what model computer, how RAM, the amount of storage space on your hard disk(s),
and if you are int he process of installing or if you hav alredy installed are you having a problem launching Illustrator or opening a file?
Also we need to know the version of Illustrator you ar trying to install or work with if you speak another language like french or spanishtry posting the information in both your native language and in English.
It is possible for use to help it may simply be a problem that you have not activated the software.
But more information is needed.