Gathering all the games
Gathering all the games
Your new PC seems to be having issues with launching Rainbow Six Siege, possibly due to the CPU or motherboard.
Have you checked all your drivers—CPU, GPU and chipset? Are you attributing the issue only to the game or the entire system? If it's just the game, uPlay likely has a check to confirm the installation and integrity of the game. I’d run that verification just to be sure.