This compatibility fix disables the automatic boost threads get when they are unblocked. Windows 9X does this only on message ...

This compatibility fix disables the automatic boost threads get when they are unblocked. Windows 9X does this only on message objects, and not on synchronization objects. The COMMAND_LINE options are: +HigherMainThread or +LowerMainThread to change the main thread priority and +BoostMainThread to leave the automatic boost for the main thread