To install ESXi 8:
You will see a list of versions. You want to select or the specific update (e.g., 8.0U1 , 8.0U2 , etc.). It is always recommended to download the latest Update (U) version available, as these contain critical security patches and driver updates.
If you strictly want the Free version and have trouble navigating the enterprise portal, look for the specific "Free Product Download" page. You will need to register a new account specifically for the free hypervisor if you do not have a commercial account.
: In the portal, under the Custom ISOs tab for your vSphere product, you can filter by OEM name (e.g., search "Dell") to find the correct install CD. Key Specifications for ESXi 8.0 Update 3