I've been running a Windows Server 2012 VM on a Windows 8 64 bit host using VirtualBox 4.2.18 successfully. After upgrading to VirtualBox 4.3.0, the VM fails to start up because it stated that it does not detect a 64 bit processor.
The version drop down also does not show any of the 64 bit versions as it did in earlier versions.
I have checked the BIOS settings of my Dell Latitude E6530, and the Intel Virtualization Technology, VT for Direct I/O, & Trusted Execution options are enabled.
Is there a way to revive my old 64 bit VMs or do I need to wait for a maintenance release of VirtualBox?
Any help would be greatly appreciated.