I spent most of the last day or so , trying to get Virtualbox to run Windows 10
I have encountered many of the errors that have been posted on the Forum at some point.
The biggest issue and route cause of the problem would appear to be a corrupt download, although it downloaded successfully and appeared to be OK, it could not have been.
It was interrupted once - although restarted and completed to the same size.
I have since downloaded it twice more and re-installed with success.
For all interested parties, these are the parameters I have used in Virtualbox to get a functioning Windows 10.
Also as a bonus, I have found that Avira Ant-virus runs successfully on windows 10.
General - O/S Winows 8.1 (64-bit)
System - Memory 2048MB
Acceleration (VT-x/AMD-V/Nested Paging)
Display - Video memory 128MB
Storage - SATA Port 0 w10.vdi (normal, 25GB)
- IDE is the ISO image
Audio - default
Network (my Wi-Fi adapter)