More than likely the scanner settings in the software are set differently. Check to see if the slow PC has the scanner settings set to page orientation>"text orientation". If it is, then you can change it to 90 degrees or 0 degrees for a significant performance increase. The onboard memory for the DR-7580 is insufficient to run at full rated speed while performing "text orientation".
This is concerned with the buffer of images that gets stored and is not written to HDD. take a more fast HDD and use another type of USB cable. Samir Dhingra 9820800633
Your hard disk must be almost full. Direct the scanning software to send data to a hard Disk location where you have enough space.
S. Mohan, India
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