I've been banging my head against the headrest of my recliner, trying to get W10 running on my Dell Intel Dual Core with W7 HP x64 and IE_11. I've followed Fred Langa's setup instructions to the letter and Oracles VM seems to work fine.

Bottom line, I'm stuck with this;
Failed to open a session for the virtual machine Win10-64 Preview.
The virtual machine 'Win10-64 Preview' has terminated unexpectedly during startup with exit code 1 (0x1).
More details may be available in 'C:\Users\Richard\VirtualBox VMs\Win10-64 Preview\Logs\VBoxStartup.log'.
Result Code: E_FAIL (0x80004005)
Component: Machine
Interface: IMachine {480cf695-2d8d-4256-9c7c-cce4184fa048}

and an instruction to reboot my computer by pressing the power button to do so. Despite my reluctance to shutdown that way, I tried it twice and ended up with the same results.

Suggestions, please??