Reply to Help Needed

I just purchased a VCI-100 and I'm trying to upgrade the firmware but when I plug in the cable to USB it says "New Hardware Found". I'm doing this on a friends PC as I am a mac user. Should I click OK to install new hardware? When I try the device manager steps it doesn't show up as a COM port because it says new hardware needs to be installed.

Any help would be greatly appreciated.

T