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I have a computer with Core 2 Duo E8400 processor and ASUS P5QL-E mainboard. Recently I wanted to install XP Mode for Win 7 but I cannot run it because I'm getting an error that hardware virtualization is not enabled for my processor.

According to this my processor support VT and I checked that VT is enabled in motherboard's BIOS. But XP Mode still won't start.

I even downloaded Intel Processor Identification Utility and it also shows me that VT is off. Does anyone know how to turn it on?

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which version, RTM or earlier? there are VPC RC issues with Windows 7 RC. –  Molly7244 Sep 16 '09 at 16:07
    
@Molly: Intel CPUID utility shows that VT is off - it is probably not an issue with Windows 7 RC itself. –  caliban Sep 16 '09 at 16:08
    
The version is RTM. –  RaYell Sep 16 '09 at 16:37
    
Just an update: after getting mainnboard from the service virtualization works just fine (they flashed it with the latest BIOS) –  RaYell Oct 13 '09 at 13:28
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1 Answer

up vote 3 down vote accepted

It is highly possible that your BIOS has not been updated to the latest version yet - thus the missing support for VT on your E8400.

The latest version of your BIOS (v1005) can be found here (you will to navigate to the Supported CPUs page). Please update your BIOS and see if VT turns on for you.

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Careful! Any BIOS update has the potential to turn a nice computer into an expensive door-stop! –  harrymc Sep 16 '09 at 16:09
    
Of course it has the potential - but it has gotten relatively safe and painless over the years. Last time, yes. Now, still possible, but very unlikely (only if the power trips in the middle of updating). –  caliban Sep 16 '09 at 16:13
    
Further, the mainboard might have an effect on whether virtualization works or not. The CPU is not the only determining factor. –  harrymc Sep 16 '09 at 16:29
    
ASUS update utility shows that the latest BIOS for my motherboard is 0705. –  RaYell Sep 16 '09 at 16:38
    
it says 1005 here on the official ASUS website. :) i suggest you get it from www.asus.com direct itself - do a search for your mobo model inside Asus website. –  caliban Sep 16 '09 at 16:48
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