Running Parallels Desktop 12 for Mac on a late 2013 iMac, 3.2GHz i5, 32GB Ram, running Sierra 10.12.2 -- I was working in Windows today and a dialog popped up saying a new version of Parallels was available so I clicked to install it. It asked me for my Administrator password and seemed to install. I went to start Windows and it asked for my Administrator password again. It acted like it removed older version and installed but came up with dialog that it could not be installed, Problem ID 15380. I am the only user on the machine. I restarted machine and tried again. Same thing. I would appreciate any help.