Plug and play device not detected

O

ossian

I try to install a USB device (USB to serial cable) on my XP (Pro) computers
A and B. A CD supplied exe file installs the signed .sys drivers correctly in
..../system32/drivers. The .inf file seems to reside only in a temporary file.

On A everything works fine, the unit is correctly identified as a Port and
installed. On B the unit is NOT correctly identified. It is listed as UNKNOWN
(and its ID is incorrect). Once incorrectly identified I cannot upgrade the
driver as the machine ID:s don´t match. I have tried different USB-ports
front and rear with no difference
TS
 
O

ossian

I may add that A and B differ by the USB hardware standard. On A, where
installation is OK, the standard is 1.1, on B 2.0. Installation also worked
on an old W98SE-system with USB 1.1. The device is claimed to work with both
standards...
 

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