Yes I had the same problem after reinstall the windows and I could not install the software patch but now is good thanks a lot. DeathFromShadow:Change the InstallDir like "D:\\" or "E:\\" it work for me [HKEY_LOCAL_MACHINE\SOFTWARE\Ubisoft\Far Cry 3\GameUpdate] "InstallDir"="C:\\Games\\Far Cry 3" "info"="ca32d7a363334a55b66633237b0335b7" you change the points where you installed the game