id summary reporter owner description type status component version resolution keywords cc guest host 2440 VT-x not detected -> BIOS issue Dopefish "I am running Windows Vista Ultimate x64 SP1. I am using the 64-bit version of VirtualBox and have virtualization enabled in the BIOS, and VT-x enabled in VirtualBox. Every time I try to use any 64-bit guest, it tells me: ""This kernel requires an x86-64 CPU, but only detected an i686 CPU."" I have ran VMware's Processor Check for 64-Bit Compatibility, and it reports that I am capable of running 64-bit guests." defect closed host support VirtualBox 2.0.2 wontfix other Windows