I don't use VM software but I have done some reading and found the following from Oracle:
"On AMD processors, we require both hardware virtualization and nested paging support"
Also found this warning regarding enabling I/O APIC:
On any host, you should enable the I/O APIC for virtual machines that you intend to use in 64-bit mode. This is especially true for 64-bit Windows VMs. See Section 3.3.2, “"Advanced" tab”. In addition, for 64-bit Windows guests, you should make sure that the VM uses the Intel networking device, since there is no 64-bit driver support for the AMD PCNet card; see Section 6.1, “Virtual networking hardware”
I'd suggest contacting Asus as it might be a BIOS issue? Obviously if you not using VMWare the above may not be accurate.
Building a reliable PC involves more than just assembling the parts. You need to be able to configure all of the BIOS settings appropriately. This can be quite involved and frustrating as it can require a lot of trial and error with stress testing. It is however often the only means to get a 100% reliable PC.