[shonda loo]

I upgraded my Windows 8 phone to Windows 8.1. Ever since the upgrade my Windows 8.1 laptop has been unable to detect the phone when it's connected to via the USB port. The phone fails to appear amongst the listings for Device Manager when it's plugged in (not under "Potable Devices", "Unknown Devices", "Universal Serial Bus...", or anything else). I've tried rebooting both the phone and laptop, it did not resolve the issue. I tried removing the phone's SD card then connecting it to the laptop... it did not solve the issue. Nothing seems to work, I know my laptop needs to install new drivers for the phone, but I can't figure out why Device Manager is failing to recognize the device when it is plugged in. Any insight or ideas?

[gpobernardo]

I upgraded my Windows 8 phone to Windows 8.1. Ever since the upgrade my Windows 8.1 laptop has been unable to detect the phone when it's connected to via the USB port. The phone fails to appear amongst the listings for Device Manager when it's plugged in (not under "Potable Devices", "Unknown Devices", "Universal Serial Bus...", or anything else). I've tried rebooting both the phone and laptop, it did not resolve the issue. I tried removing the phone's SD card then connecting it to the laptop... it did not solve the issue. Nothing seems to work, I know my laptop needs to install new drivers for the phone, but I can't figure out why Device Manager is failing to recognize the device when it is plugged in. Any insight or ideas?

You may find the information in this official website particularly useful, especially item #4.