Upgrade ESX3.5 tu vSphere 4.01

Monday I upgraded one ESX 3.5 host to vSphere 4 Update 1 with Host Update Utility: All OK.
The host was an IBM X3650 with local storage. The only issue that I find is the management station that can't upgrade the client inside. The station is a old Win2000 server with a fax server software. When I tried to install the client this message appeared

I used another client for the management.

Italian
Lunedì ho agggiornato un server ESX3.5 a vSphere 4U1. Tutto ok a parte il server di management he era un vecchio win 2000 server: il client di vsphere richiedce almeno un win xp sp2 per l'installazione

aLex