How can I stop an unexpected Windows 10 update?

Celia's working day was almost ruined after she was caught out by an enforced update. Can she stop it happening again?

Yesterday, I intended to take my laptop to visit a client, but when I was about to set off, yup, I couldn't turn it off without allowing Microsoft to do its upgrades. We all know how long that takes, and I had a train to catch, so I ended up having to wing the whole presentation.

The infuriating thing is that I knew there was an upgrade around, so I had checked the power settings that morning to see if one was waiting to be installed. There was no update at 9am. Somehow Microsoft snuck it in without my noticing.

It's easy to be caught out by Windows updates, and I once left the house carrying an open laptop, confident that the update would finish long before the battery ran down.