>>Hi,
>>
>>My old application run fine on my old AMD K5 133Mhz PC loaded Win9x
>>on 32M of RAM.
>>
>>However, when we tested it out on a new system with AMD K6 II 350Mhz PC loaded with Win9x on 32-64M of RAM, the whole system including my application and Window explorer and DOS prompt temporarily will halt
>>for a few seconds and then resume back to normal. It often happen
>>to all program. Anyone had similar experience, please kindly advise
>>me on the cause and solution.
>
>This sounds more like a hardware configuration problem. I had a similar problem with my machine when I installed a SCSI card that was using IRQ 10, the same as my video card and my network adapter card. Changed the BIOS for the slot the SCSI card was in to use IRQ 9, and the "pausing" went away.

Another possibility is the BIOS Sleep Mode and ACPI may be slowing down or shutting off devices after a period of inactivity. Go into your CMOS Setup and disable ACPI/APM (ie turn off Power Management) and make sure that you don't have hard disk spindown or processor slowed when idle.

Before changing interrupt assignments, make sure (1) that you understand what the settings you change mean, (2) what changes were when you started. One of the easiest paths to screwing up hardware is to change settings without both knowing what the setting is supposed to, and more importantly, how to set it to go back the way it was now

Win9x makes me very suspicious - exactly which version of Win9x are you running, and with which Service Packs installed? There are tremendous differences between various Win95 flavors, not to mention Win98 and Win98SE.