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I just bought this computer with ASUS Z97-E motherboard and Intel i7 4790k. I really would like to enable hardware virtualization so I can use install 64-bit OS as my guest machine.

The problem is, every time when I turn on virtualization in BIOS settings, save and exit. The machine will shutdown. LEDs flash for a few times and the machine boots up with information "power surge detected, press F1 to enter settings". It seems like the C.P.R is automatically invoked.

UPDATE: I guess it has nothing to do with power surge. I tried to disable the power surge detection in BIOS, and made sure it is disabled. Then I restart my computer with VT-x set, it still automatically shutdown, turn-on for half second, shutdown again, turn-on and flash, shutdown again(repeating this for several times), then the power came on asking me to enter BIOS setting and I can see the settings are reset back to default with no VT-x and power-surge detection on again. Is this the problem of motherboard, or CPU? Only this option(VT-x) is troublesome.

Is there anyone having this issue? What could be the possible cause? CPU? Motherboard? Power supply?

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  • Hardware virtualization is not required for any 64-bit OS.
    – Daniel B
    Commented Mar 14, 2016 at 6:23
  • @Daniel B, He said "guest machine", and that's indeed a requirement for VirtualBox: virtualbox.org/manual/ch10.html#hwvirt
    – Tom Yan
    Commented Mar 14, 2016 at 6:58
  • @Yang Du, sounds like a UEFI bug. What's the version of your UEFI ("BIOS")? There is an update in Jan 2016 (Version 0802): asus.com/us/Motherboards/Z97E/HelpDesk_Download
    – Tom Yan
    Commented Mar 14, 2016 at 6:58
  • @TomYan Guess I missed that. // From my experience, it’s normal that the system completely shuts down when making settings changes like that. Of course, it’s a mystery why VT-x being disabled is the default.
    – Daniel B
    Commented Mar 14, 2016 at 8:22
  • @TomYan Thanks Tom. I tried this but with no luck. This is really weird as I can tune any other options in BIOS except for VT-x. There was only once that I successfully enabled VT-x and the BIOS doesn't reset. But after that the BIOS hangs on the logo screen and I cannot input anything to enter the BIOS settings. I was thinking about returning the parts but magically when I unplug the hard disk and plug again the system boots up. Seems like maybe some of my parts are defective, maybe motherboard but I am not so sure. Any suggestions? Should I buy a new motherboard as the last resort?
    – Yang Du
    Commented Mar 15, 2016 at 7:06

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