Here's a guide to install Windows 10 via USB - http://www.techradar.com/us/news/so...-to-install-windows-10-via-usb-or-dvd-1300279
Hello, It seems that you're on outdated build of Parallels Desktop 11, please update Parallels Desktop to the latest build 11.1.1 (32408). You can update to the latest build as suggested in this article. Latest version always available here: http://www.parallels.com/directdownload/pd11/ Please note that Parallels Tools also needs to be updated (Actions > Update Parallels Tools). Please see this article to know more about Parallels Desktop 11 for Mac updates summary.