Other servers have a virus, so it popups an "Asks a File" when u exit the CS 1.6 but because when u open it the program, its actually harm your computer, like Adware and Trojans... Cause scan your antivirus!
Autoconnect:
Similar to a virus, but when you press "escape" you actual see, it changes a GameMenu, it auto connects you to the another server (happened when starting the game).