MacBook Pro with OSX El Capitan, Parallels 10, Windows 10 version 1511 build 10586.589. Windows is now trying to update itself via the large Anniversary Update 1607, but the following dialog appears and Windows reverts to the previous version. Can anything be done to override this and allow Windows to update as normal? "OSX has prevented the guest operating system from changing the boot loader on your physical hard disk. (...) For security reasons this operation was blocked by OSX (...)"
((UPDATE ON SITUATION)) The Anniversary Update appears to have loaded and installed without a problem the second time I tried, so this case is closed.
