I have the same problem, but when I first launched it my PC suddenly started to close other windows and the PC got ready restart. Uplay say there was an error, and that I should find a crash report under c:\Programfiles (x86)\Ubisoft\Ubisoft Game Launcher\crashes, but there are no crashes folder and no file that gives me any information of why it start shutting down my PC.

I Verified the files, and the same thing happened. When I try to start again it just stays at Assassin's Creed logo until I close it. I never seen a game in the last 10 years trying to restart the PC when it launches the game.

@all1neediskill Moving the install to the drive made the game work for me. I see it hasn't worked for some and worked for others.

I have the same problem, but when I first launched it my PC suddenly started to close other windows and the PC got ready restart. Uplay say there was an error, and that I should find a crash report under c:\Programfiles (x86)\Ubisoft\Ubisoft Game Launcher\crashes, but there are no crashes folder and no file that gives me any information of why it start shutting down my PC.

I Verified the files, and the same thing happened. When I try to start again it just stays at Assassin's Creed logo until I close it. I never seen a game in the last 10 years trying to restart the PC when it launches the game.