id summary reporter owner description type status component version resolution keywords cc guest host 9190 Failed to open session Anne "OS Host system: Windows 7 64bit OS Guest system: Windows 2008 64bit Configuration of virtual machine works fine, but when starting the virtual machine for the first time to install Windows 2008 64bit, the session fails to open. The dialog box displays 'Unknown error creating VM VERR_VMX_MSR_LOCKED_OR_DISABLED' (please s. screenschot). The log file is attached." defect closed installer VirtualBox 4.0.10 worksforme Windows Windows