I've been using lightroom tethered capture for quite a while without any problems. Now out of the blue the pictures are not transferring to the PC. lightroom is saying "transferring files from camera" The little wheel is spinning but nothing else is happening. I can operate the camera from the PC.I have enough space on my hard drive I've tried it with and without a memory card in my camera. With different USB ports on my PC and with different USB cables. Same result. I am using: Lightroom cc and Windows 7
Please turn off the Graphics Processor from Lightroom preferences.
Go to Lightroom Preferences from the Edit menu
Click on Performance tab
Uncheck the Graphics Processor
If the above step didn't then you can try reset the Lightroom preferences back to defaults.
Press the shift + option Or shift + alt keys immediately after you restart Lightroom, and select Reset Preferences from the resulting dialog box.
Let us know if that helps.