Hi,
vCenter Server 5.0 requires a 64-bit operating system and cannot be installed on a 32-bit operating system.
- Microsoft Windows Server 2003 Standard, Enterprise or Datacenter SP2 (required) 64bit
- Microsoft Windows Server 2003 Standard, Enterprise or Datacenter R2 SP2 (required) 64bit
- Microsoft Windows Server 2008 Standard, Enterprise or Datacenter SP2 64bit
- Microsoft Windows Server 2008 Standard, Enterprise or Datacenter R2 64bit
vCenter Server 5.0 is compatible to all ESX 4.x and ESXi 4.0 and ESXi5.0 hosts. Except ESX/ESXi 4.0 Update 2 is not supported for use with vCenter Server 5.0
Regards,
KB