Have you tried installing the drivers from scratch? If you haven’t try installing them again. You can try using the Integrated installer found here IoT - Intel® Edison Board Download | Intel® Developer Zone .
Also take a look at IoT - Step 2: Run the integrated installer | Intel® Developer Zone
This is what I got from following the "Integrated Installer procedure" there...
Intel® Edison is now installed
Errors detected during installation. Some components failed to process:
Now that you are done installing your drivers, updating the firmware on your board, and installing your IDE, continue by setting up your serial terminal .
Try with the Flash Tool Lite.
Go to IoT - Intel® Edison Board Download | Intel® Developer Zone and download the latest Edison image, labeled “Release 2.1 Yocto complete image”.
Then, download the Flash Tool Lite for your OS and install it. In this link IoT - Flash Tool Lite User Manual | Intel® Developer Zone you can find instructions on how to install it and flash your Edison with the latest image.
Yes. Thanks for following up.
It was an issue with Windows 8,1 image I got installed in my laptop.
We rebuilt it from scratch and now it is working like a charm.
On the other hand still flashing last firmware to the Edison is cumbersome. I have not done so,but it works fine with the WW15 image I have.