What you are looking for is 'ADM SVM support' in 'Configuration' menu...
It seems that Lenovo G50 originally came without that option and some (not all) managed to solve the problem with BIOS update (
[
^])...
In any case (and despite that A6-6310 features AMD-V) you should check it:
CPU-Z | Softwares | CPUID[
^] (maybe it is an other model inside)