Are you win7 or vista? This is generally a problem of these two systems, the programs are incompatible, and some DLL files are not available. You can download a perfect patch to try. If not, you can ask your friend to give you an AION. BIN file to replace the previous file. If not, you can try. The recently downloaded and installed program was uninstalled shortly before this problem occurred. If it can't be solved, there are only two solutions, either reinstall the game or change the system.