VT-x Error for VB 4.26 on Dell R710 Win 2008 R2 Enterprise 6

[Sal]

Dear Virtualbox Experts,

I am new to virtualbox. I have a fell r710 running windows server 2008 r2 enterprise. I have enabled virtualization technology and SR-IOV Global from the bios. Hyper-V runs without complaint on the server. However, I am trying to run the neurodebian 64 bit udbuntu virtualbox distribution, and get a VT-x error. When I go into settings the acceleration tab is grayed out. I tried doing a complete shutdown with delay prior to restarting power, but these problems persist.

Any suggestions on how to correct this matter would be greatly appreciated.

Best wishes,

Sal

[BillG]

VirtualBox cannot use hardware virtualization if you have Hyper-V enabled. Hyper-V will lock it as soon as you boot your system.

You will need to disable Hyper-V or set up a boot option to boot Windows without virtualization. There is an option in the Windows Boot Loader "hypervosorlaunchtype". Do a bcdedit /enum from a command prompt on the host to see the current setting.