This has happened to me enough times for me to try and figure out a solution for how to prevent this from happening. Most times I notice this as it happens and so apart from the nuisance of having to move the folder back to its proper location - no harm done. Yet, recently it seems I accidentally moved a folder by dragging it into another folder and unfortunately this happened without me noticing. Eventually I found it, but it did cause some panic and confusion.
I'm guessing there is a way to have Windows prompt me before moving a folder, just like it does before deleting a file/folder. Can someone clue me on how to do this? Or if there is a better prevention method for the above, please let me know.