imo there's a serious error w.r.t. the Adobe Reader download manager. The @#$%^& *&^%$ thing has apparently set a flag somewhere such that it thinks Reader has been downloaded on my system. So I'm unable to do another download as every time I try it I get a ^&*(+ message saying the download is complete.
Get Revo Uninstaller http://www.revouninstaller.com/revo_uninstaller_free_download.html and uninstall GetPlus. That will also uninstall a couple of files and settings dealing with NOS.
But I suspect you will not be any better off when you try the Download/Install again. I have the same problem.