id summary reporter owner description type status component version resolution keywords cc guest host 8007 Cannot open any VM sessions - VT-x is not available Rich Johnstone I cannot open any VMs, regardless of what's in them. I always get the same message - as in the picture attached. Processor is an Intel CoreDuo2. defect closed VM control VirtualBox 4.0.0 wontfix VT-x VERR_VMX_NO_VMX Linux Mac OS X