8.3 Game or Timing-Sensitive Applications Some game applications or applications that rely on the computer's timer may perform poorly in Windows version 3.1. You can try increasing the performance by turning off the TrapTimerPorts setting in the [386Enh] section of the SYSTEM.INI file, as follows: TrapTimerPorts=Off Note: The TrapTimerPorts setting is on by default. Turning it off may cause errors or a loss of data when transferring files by using a communications application. It is recommended that you leave this setting turned on when using a communications application. .