I recently moved from a Mac to a PC at work. Formerly, on my Mac I was able to drag an image straight from Lightroom to an open InDesign or Photoshop file. I am finding now, on the pc that I am unable to do this. Is there some fix for this or will I have to alter my workflow?
I can confirm that clicking and dragging from the Libary module doesn't work in Windows, however you would be better to ask Adobe why it doesn't work.
Until Adobe fixes it, you can right click an image and choose Edit in > Edit in Photoshop. And to get an image into another application, you can right click it, and choose Show in Explorer, and when Explorer opens, the file will be highlighted, and from there you can click and drag it into another application.