Auto update impossible

My “comodo internet security” don’t want update. it’s say that it can’t download update. I’ve try to reinstall but i’ve the same problem. It work on another computer on the same network.
Before reinstall i couldn’t access to the comodo website.
My computer is on Windows 8 not 8.1 and my Comodo version is : 6.3.302093.2976
Sorry for my English but i’m french.

What you have installed is the most up-to-date stable version. Therefore, there should not be any program files to update unless you removed part of it, or removed the sound file.

Also, please check the program version of the other computer which has updated and let me know which version is says it is.