Enable Long (64-bit VT-x) Mode Support on Latitude D630 for VirtualBox

I was in the process of setting up a 64-bit CentOS x86_64 virtual machine instance on my Dell Latitude D630 and received a message from the RHEL installer: “Your CPU does not support long mode. Use a 32bit distribution.”

This perplexed me a bit, as I verified that the D630 with Core 2 Duo T7250 does indeed have VT-x support. Apparently, VT-x mode is not enabled by Dell by default and I do not see a setting in BIOS to turn it on. Instead, Dell’s Client Configuration Toolkit (CCTK) must be installed and used to enable VT-x. Thanks to this web site for providing instructions:


Basically, the steps are this:

  1. Download Dell CCTK here: http://www.dell.com/support/drivers/us/en/19/DriverDetails?driverId=6HCTN
  2. Install CCTK
  3. Run c:\Program Files (x86)\Dell\CCTK\x86_64\cctk.exe --virtualization=enable
  4. Create your VirtualBox virtual machine and enable “VT-x” in Settings > System > Acceleration > Hardware Virtualization

One Response to “Enable Long (64-bit VT-x) Mode Support on Latitude D630 for VirtualBox”

  1. Please elaborate step 4 dont understand it

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