Windows 7 64-bit does not recognize 64-bit CPU in Virtual PC RRS feed

  • Question

  • When I attempt to install Windows 7 64-bit in a Virtual PC instance, I get the following error:

    0xc000035a  Attempting to load a 64-bit application, however this CPU is not compatible with 64-bit mode.

    This is a mystery because I am running Windows Vista x64 on an Intel Core2 CPU.  The virtual machine's property page, however, shows a processor of "Intel Pentium III class" with "MMX, SSE2, Intel VT".  I have tried this both with and without hardware virtualization and with the maximum amount of physical memory.  The Virtual PC software that I installed is the 64-bit version, but it is reporting an incorrect CPU class.  Any help will be appreciated.

    Kind regards,

    Monday, January 26, 2009 8:35 AM


  • This is a limitation in Virtual PC.

    Virtual PC only supports 32bit guests.

    • Marked as answer by Opus42 Monday, January 26, 2009 9:33 AM
    Monday, January 26, 2009 9:32 AM

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