ESX 4.0, Update 1, Alert: If you plan to upgrade ESX 4.0 to 4.0 Update 1, it is critical to read KB article 1016070 before proceeding with the upgrade.
vCenter 4.0 Update1 Alert (Affecting ESXi 4.0/4.0U1): After upgrading vCenter Server 4.0 to 4.0U1, the following error message might result while reconnecting ESXi hosts to vCenter Server, "Cannot install the vCenter agent service. Unknown Installer error". If you have ESXi hosts connected to vCenter Server 4.0, do not upgrade vCenter Server to Update 1 before installing the patch referenced in KB article 1016262.
vCenter 4.0 Update1 Alert (Affecting ESXi 4.0/4.0U1): After upgrading vCenter Server 4.0 to 4.0U1, the following error message might result while reconnecting ESXi hosts to vCenter Server, "Cannot install the vCenter agent service. Unknown Installer error". If you have ESXi hosts connected to vCenter Server 4.0, do not upgrade vCenter Server to Update 1 before installing the patch referenced in KB article 1016262.
Download VMware vSphere 4
Customers who have purchased VMware vSphere 4 can download their relevant installation package from the product download tab below.
Get Your vSphere License Key
Looking to upgrade from VMware Infrastructure 3? Visit the VMware vSphere Upgrade Center.
Once you have purchased VMware vSphere 4, you will receive a licensing confirmation email with your license keys or you can retrieve your license keys from the vSphere License portal.
Need help downloading?
Read the VMware Knowledge Base article: Downloading VMware products and troubleshooting issues with downloads.
