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Sony has decided to disable a key feature on laptops, to enable virtualization extensions.  My laptop is one such laptop.  Using various resources available on the internet (FreeDOS, symcmos.exe, and a list of firmware codes) – I was able to enable the VT-x extensions.  Awesome.

For those Googling, my laptop model is Sony Vaio VGN-FZ140N.  Firmware model: R0050J7.  I modified the value ’02D3′ to ‘0001’ using the symcmos tool, and all is well.

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