1. Click Download now, to download the file.
2. When the File Download window appears, click Save this program to disk and click OK. The Save In window appears.
3. From the Save In drop-down menu, click to select Desktop and then click Save. The file will download to your desktop.
4. If a Download Complete window appears, click Close. A new icon appears on your desktop.
To install VMware ESXi with this downloaded .ISO file using CD-ROM method, you need a CD-R or CD-RW and appropriate software to create a CD. Follow your CD writing software vendor's instructions to create a CD.
For additional install instructions, refer Installation/Deployment guides available at https://www.vmware.com/support/pubs/vsphere-esxi-vcenter-server-pubs.html