I installed VMware ESX 4 recently, however it seems it not Update 1.
Is this a patch that it will download, and then i can remediate to the ESX hosts?
http://www.vmware.com/support/vsphere4/doc/vsp_esx40_u1_rel_notes.html#installation
Read the section entitled:
Upgrading or Migrating to ESX 4.0 Update 1