Create a new text document and rename it exactly to filesyscheck.cfg (ensure the extension is .cfg and not .cfg.txt ). :
C:\Program Files (x86)\Steam\steamapps\common\Call of Duty Modern Warfare 2\main filesyscheck cfg modern warfare 2 top download
The file is a configuration file for Call of Duty: Modern Warfare 2 (2009) Create a new text document and rename it