- Update your graphics drivers.
- If Updating didn't work, try a clean reinstall of the drivers.
Deinstall. Reboot. Disable Antivirus (if used). Install. Reboot. Enable Antivirus (if used)
- Make double sure the game runs on the correct core (if multiple cards are used)
- Never *ever* run it from the zip; always extract first and run from folder
- Maybe the files got damaged somehow.
Re-download with disabled antivirus.