ESXi 5.1 requires the NX/XD bit to be enabled for the CPU in the BIOS. A full list of the ESXi 5.1 Hardware Requirements can be found in the Check the (HCL), to discover if your computer is certified for use with ESXi 5.1. If your computer is not listed on the VMware HCL, it may still be possible to install and run VMware ESXi 5.1 on your laptop, desktop, or server. The HCL exists because the server vendor and VMware have certified and tested ESXi 5.1 will function correctly, on the servers listed on the HCL. Register with VMware.com and Download VMware vSphere Hypervisor 5.1 Open the following link in your web browser Click the License and Download Tab Click Create an Account, to Create an Account and Login to the VMware Download Center.