Guest 64bit operating system on VM Server 2.x on Dell Optiplex 755

In the BIOS you need to change the following settings

  • Security > Execute Disable (set to On)
  • Performance > Virtualization (set to On)
  • Performance > VT for Direct I/O Access (set to On)
  • Performance > Trusted Execution (set to Off)

Save and exit the BIOS, then power the computer down. You must power it down for the settings to take affect.

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