You could try deleting all the .ini files (where settings may have been damaged, Luthier's comment not mine), Validate CoD in Steam and run it once to re-create the .ini's. It means starting again with the in-game setup but at least you know you have a clean start, especially if you installed any beta patches.
Delete all ini's in the CoD folder, the \Steam\userdata\79775862(??)\63950(??)\remote\ folder and your \My Document\1C Soft Club\CoD\ folder. I backed up the originals in case anything went horribly wrong - but it didn't.[/QUOTE]
i can give this a try ....