Hey, TickleMeShrek!
Welcome to the forums. I have seen similar reports from other users on the forums and they have advised the game was being blocked by Bitdefender. Here's how to fix it:
-Launch Bitdefender
-Click Settings
-Click exclusions
-Click add exclusions
-Add rainbowsix.exe
If you have Bitdefender please try the above steps. If you do not have Bitdefender or the issue persists please try the following:
Run the game with
ADMINISTRATOR RIGHTS.
Verify your game files.
It is possible that the installation of your game is faulty. To fix this, please verify your game files:
UPLAY
EPIC GAMES LAUNCHER
STEAM
Disable Background Applications.
Make sure your
OPERATING SYSTEM is
UP TO DATE.
Reinstall Uplay.
Update your GPU Drivers:
AMD
NVIDIA
Should the issues persist after completing the above steps, please
GET IN TOUCH, attaching
DXDIAG and
MSINFO reports to your
SUPPORT CASE.
Thank you.