I can't download the patch client ; I've got an error almost at the end of downloading.

i dont have any trouble to download it.. can you pls post your error message?

I re-try to download it ; it would have seemed ok but when the game is loading I've got another error : "v.1.65 injection failed" ... then it says that press ESC to exit the game ...
I don't know what happened ! do you know how to solve this problem ?

its an easy fix give me 3 seconds to find it, I had this problem a year ago.

You need to install Microsoft .NET Framework 4.6. You may be able to download it with your Windows Updater, or you can otherwise find it here: Microsoft .NET Framework 4.6
You will also need to install the Visual C++ Redistributable for Visual Studio 2015 for x86.
If you still keep seeing this issue, try disabling your anti-virus temporarily

:Edit; The links didn't copy but Visual C++ Redistributable for Visual Studio 2015 for x86. Fixed my issue.

Hey thank you for your answer it has worked perfectly