Microsoft product activation fails with error 0x80000048

If you need to activate windows over the phone (e.g. for a server isolated from the internet in say, a DMZ) but get error 0x80000048, you'll need to enable (and start) the Telephony service which seems to be needed to pull up the phone numbers you need to call.

The updates you are trying to apply are not Dell-authorized updates

If you get the error "The updates you are trying to apply are not Dell-authorized updates" on a Dell Poweredge server when trying to update firmware with the Lifecycle Controller (F10) option, you need to update the DRAC and LC firmware through the DRAC gui (or with RACADM).

You need:

iDRAC – at least version 1.85 or newer

Lifecycle Controller – at least version 1.5.2 or newer