the game has been known to lock @24 hz refresh rate for those who use HDTV as their moniter…in both these cases, folow these steps; 1. Go to Documents\Ubisoft\Tom Clancy Ghost Recon Future Soldier\default.cfg
2. The document is all jumbled, but look for Fullscreen=True and change it to false…
This will enable u to run @ 60hz and open the game to change you settings.
After you get in game and change the setting to what u need, then u can re-edit the file and try running in fullscreen by changing it back to fullscreen=True. If your game goes back to running @24hz. then u have to run in windowed mode and wait for Ubisoft to release a patch for the fix.