When I launched Lineage II. Game said: "A monitor program has been found running in your system. Please, unload it from memory and restart your program." How to improve it !! I want to try now :(
There is a program running in the background that the game thinks is trying to capture data from it; disable the program and you should be able to play.
Press Ctrl-Alt-Del, open up the Task Manager System and looks at the Processes tab to see what is running on your computer.