I've been connecting my phone to my laptop to transfer files between the two for about a year.
About a week ago, I started getting the above message.
I've been connecting it several times since, and apart for the odd once or twice, I have been getting the same message. The phone still charges, it isn't recognised by my laptop.
That's a different ohone. But it does suggest a PC or lead/connection issue. Could try a different lead. Have you updated the PC since the last time the phones were recognised ? Does thd PC have the latest and uncorrupted drivers to connect to the phones ?
I was also going through with this problem about a couple of days ago. I found that the USB Device was not able to connect with the provided frequency. So I suggest that PLease Change the Device.