Campbell Scientific SC-USB USB to CS I/O Optically Isolated Interface - Manual (Page 21)

SC-USB USB to CS I/O Opto-isolated Interface
If you are installing from a CD insert it now. If the PC does not find the
drivers or if you are installing them from copy on your hard disk, select “Show
me other options” and choose the browse option to point to the directory
holding the drivers.
You will then get this message:
The drivers supplied are Microsoft WHQL certified by the SC-USB chipset
manufacturer (FTDI); however, changing the descriptor to SC-USB prevents
windows validating the drivers. Select the second option as it is safe to install
the drivers.
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