I've installed the latest version of Parallels Desktop 11 (11.1.1 (32312)) on a Mac Book Pro 15" with latest El Captian (10.11.1) and have tried twice now to migrate my Windows 10 PC (which was upgraded from Windows 7) via a USB drive. The migration completes w/o error and then when parallels tries to launch the VM the first screen is Upgrading Windows 10 (not sure why it's upgrading as it was already a Windows 10 install), then after a few minutes that screen goes away and I'm left with a blank screen that hangs at "Trying to boot from SATA drive 1...". I've found KB#113342 which directs using the Bootrec.exe tool in the Windows Recovery Environment to repair a corrupt MBR but that seems to require booting into Windows on the VM which I can't do.