I'm not sure but on the previous session with laptop and MSE I may have left the connection running for 6 hours and I had no auto update.
So I did manual update. Its no great problem as I still have avast running. And no trouble to manual update.
New problem this morning.
I leave computer unconnected but because wireless is still capable, the laptop has been connecting by itself to unsecured networks that it can reach. The connection can activate but is not strong enough for transfers, (or transfers are perhaps denied by my defenses - but unlikely), so some auto updates attempted to load while I was busy elsewhere. When I returned to the laptop, Microsoft had posted some error messages related to failed auto updates. So I was really happy about that, even if it was the first time that there was some notice from MS about the auto update service. I didn't manual update this time, but set my own internet connection - Vodafone USB removable modem (vodem) - and left the laptop to wait for auto update.
After 5 hours there was no auto update. Perhaps I need to wait for the 8 hour interval, but I cannot see why MSE will not auto update when there is a new definition available, as avast does not long after the computer has been powered up, regardless of the circumstances. Maybe with a fail, the 8 hour interval starts all over again.
Irregularities may arise, perhaps, due to off and on nature of my computer use - my vodem can only be used one computer at a time, no network capacity, but also only one computer at risk at a time, so ideal for trying different options. But 5 hours is too long to wait and in the end I had to manual update. I needed to use the vodem elsewhere on a different computer.
I can only suggest once again that MSE is suited to computer that is connected 24/7 or at least on a consistent enough pattern to ensure that auto updates, when ready, register not long after boot up. That said, manual updating is not too big a problem to make a part of my work routine for the time being. Also Microsoft have sent through reports to help me deal with one problem that can crop up while laptop is unattended. Obviously, if I want to continue making use of different technology as I have been, then I have to put up with issues that can emerge.
And I'm still making use of MSE as part of my defence plan.