When receiving a "Client File Corrupted" Error there are several possibilities as to what the problem is, and several solutions.
1. It is possible your Drivers are not up to date
Solution - Update ; Follow this article for a step - by - step on updating your drivers;
How to update a driver - Cyberwalker.com
2. If you used an Xtrap Bypass, it is highly likely this program caused a corruption in your Crossfire files.
Solution; Be sure to completely uninstall the Xtrap Bypass.
Completely Uninstall Crossfire, And Reinstall Via the Z8Games website.
Make sure to restart your system as well. It's recommended you also run a virus scan as several Xtrap Bypass programs contained viruses.
3. There's a possibility an Anti-Virus Program may be blocking Crossfire or one of its components from running smoothly.
Solution ; Add Crossfire to your Anti-Virus Program's "Exceptions List"
If you are not sure how to do that, Simply look up "(Your Anti Virus Name Here) Add to Exceptions List".
If You are unable to do so, You may want to consider switching Anti Virus Programs, Or even Temporarily disabling your program.
Good Luck =/