Eliyas,
Here is the verbose setupapi.log, after placing the Sigma.inf file into
C:\Windows\INF. There is no reference to the hardware or VID/PID in the
registry, or in the Enum tree. No other INF in Windows\INF contains the
VID/PID.
I plugged the hardware into the computer's USB port, clicked to Search for
drivers and pointed to C:\Windows\INF where the drivers could be found.
In this log, it seems to find the INF, open the PNF, then fail at finding
the best compatible driver. This exact same result occurs if I instead have
it point to the folder on my Desktop which contains the INF and SYS. This is
the exact same result in the setupapi.log that I've gotten no matter what I
try. It finds the INF, processes it (or just opens the PNF), and then fails
to find the best compatible driver.
Here's the verbose setupapi.log (too long to paste here):
ftp://files.apteryx.com/setupapi/setupapi_verbose.log