How to upgrade NEC SV8100
Put firmware files onto root of clean usb drive
Open the Field Upgrade folder and copy everything in the Field folder to a blank USB
Put USB pendrive in to the SV8100
Turn of system
Press and hold small grey button to right of usb slot (labelled load sw)
Whilst still holding grey button, power on system.
Continue to hold grey button in.
One of the red leds below the USB slot will start flashing
Release grey button at this point
After about 60 seconds THREE leds below usb will be flashing red
Upgrade now complete
Remove usb drive
When it comes up, connect to PC Pro and near bottom of first screen on right side, check system software is at 9.5
Here are some links to a video on SV8100 Field Upgrade: