Result code: E_FAIL (0x80004005)? Here's How We Fixed it
FIX: VirtualBox VM Session was closed before any attempt to power it on (Solved) - wintips.org - Windows Tips & How-tos
How to Fix 0x80004005 Error When Starting Virtual Machine in Oracle VM VirtualBox (Windows 7, 8, 8.1 and 10) – Useful tips and tricks, tutorials, workarounds, fixes, downloads and much more!