Upgrade ESX 3 to version 4.1.0
to upgrade ESXi to 4.1 Click here KB ID 0000305 Problem I had to upgrade some ESX hosts from ESX 3.5 the other day, as they are a long way away, and version 4.1 is hot off the presses (at time of writing) that’s what I wanted to upgrade them to. Lessons Learned 1. At first I tried with the “Host Update Utility”. 2. But no matter what version I gave it, it gave me this error, Unsupported ESX version: esx-4.0.0...