![]() To make virtualization more accessible to many more PCs for small and midsize businesses wanting to migrate to Windows 7 Professional, Ultimate and Enterprise, while still running Windows XP-based productivity applications, Microsoft decides to remove the hardware virtualization technology prerequisite requirement in order to run Windows Virtual PC. This error message indicates that the processor does not support the HAV feature. This error message is displayed when user tries to start or configure a virtual machine that is not running Windows XP Mode. Windows Virtual PC cannot start because this computer does not support hardware-assisted virtualization Check the System event log for more details This error message indicates that the hardware-assisted virtualization (HAV) feature is not enabled on the computer.Ĭannot start Windows Virtual PC Host Process. Unable to start Windows Virtual PC because hardware-assisted virtualization is disabled One of the following error messages will be displayed instead: As the result, user cannot start, configure or run any virtual machine including Windows XP Mode in Windows Virtual PC. Even if HAV is supported, some PC manufacturers and vendors have the function disabled, turned off and locked in BIOS level (Tip: How to check and verify hardware virtualization support on processor). Some computer system with low-end or mid-range Intel and AMD CPU processor which does not support hardware-assisted virtualization (such as Intel VT-x, VT-d or AMD-V). The Windows Virtual PC (VPC) designed specifically for Windows 7, take advantage of HAV support on processor to improve the performance of virtualization technology (VT) when the virtual machines are powered on. One of the original system requirement (part of Windows 7 system requirements) for Windows Virtual PC (and hence Windows XP Mode) is that CPU must support hardware-assisted virtualization (HAV) and has the feature turned on or enabled in BIOS.
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