The installation files are corrupted. There are several reasons why this may
happen.[*]Your system might be instable or an application might be interfering with
the installation process. Reboot your computer and try installing the game
again.[*] Your Temporary Internet files might need to be cleared.[*] For Internet Explorer users: Click on Tools, select Internet Options and
click on Temporary Internet files (or "Delete...") from the General tab.
Select "Delete Files". This may take several minutes. Once it's done, download
Combat Arms again.[*] For Firefox users: Click on Tools, select "Clear Private Data" and then
click on "Clear Private Data Now". Once it's done, download Combat Arms again.[*] Your download manager could be corrupting the downloaded files. If you have
a software that you use to manage or accelerate your downloads, we suggest
that you turn it off and download Combat Arms without it.