To resolve this problem, please follow these directions:
1) Download the GRAW_KeyFix.zip from http://help.support.ubi.com/GRAW_KeyFix.zip
and extract the files into a folder on your desktop.
2) Put the Ghost Recon: Advanced Warfighter CD/DVD (disk 1) in the drive.
3) Exit out of the autorun menu (don't lunch the setup from the autorun).
4) Launch the provided GRAW_KeyFix.exe (two DLL files have also been included in case they are needed)
5) When prompted to do so, locate the setup.exe file from the game disk.
6) Continue with the setup as usual.