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        Int28Filter=<number>

   Default: 10
   Purpose: Specifies the percentage of INT28h interrupts,
            generated when the system is idle, that are made
            visible to software that is loaded before
            Windows. Windows will reflect every nth
            interrupt, where n is the value of this setting.
            Increasing this value might improve Windows'
            performance, but may interfere with some memory-
            resident software such as a network. Set this
            value to 0 to prevent INT28h interrupts. But
            note that setting this value too low will add
            to system overhead that might interfere with
            communications applications.
   To change: Use Notepad to edit the SYSTEM.INI file.