This message appeared when I logged in today.It came from Internet download manager and Adobe reader. which are set to auto-start on user start up. I manually tried to open Internet download manager and still got the same error. I have never seen such a thing. I suspect this is caused by a virus. I had to download something(With IDM) so I downloaded the .dll file(With chrome) from a dll website and copy-pasted it into IDM's folder and everything went to normal. Have you had this experience? Can this dll downloaded from the web be a virus?