I re-downloaded and reinstalled Parallels (in case there was something wrong with my installation of that). This did not fix the problem.
Reinstalled Parallels Tools under new install of Parallels. This did not fix the problem.
I made another user account… When Parallels locks up the Windows icon dragging in one account, it does not break icon dragging in the other account. (Alas, switching between open accounts does not un-break the icon dragging, as I'd hoped it might.)
Faulty Parallels continues to be annoying.
Feel free to help me at any time here.
Last edited: Apr 19, 2014