Hi so many people have this problem and i saw someone on the forums saying that i need to change TnL=1 to TnL=0
Okay so i did it and when i save the file it says access denied .. whats the problem -_-?

Try searching for "Notepad" in the start menu, right clicking it, then clicking "Run as Administrator". When notepad opens, navigate to C:\Windows\Ubisoft\ubi.ini and make the change you mentioned above.

I did it and nothing happen same thing

If your computer uses the Intel Graphics HD chipset, it doesn't render the graphics, no matter what is done. If it's a fairly newer version, it MAY work but the majority of time, this chipset cannot render the graphics properly.

On some laptops, you can right click the game icon, go to "Run using graphics processor..." then click "High performance NVIDIA processor" to get it to work. If not then just wait a while... I'm going to be doing something soon that might help you.

Having just read the OP again, the problem seems to be that the file you are editing is "Read Only". Check the file properties (by right clicking it and clicking Properties): if the Read Only checkbox is selected, make sure to uncheck it and try again.