i rebooted and manually checked for updates again and it said I am up to date. Was fearing some kind of loop was going to start but all ok, so I think just a bug/glitch
Thanks for the input. Since this is a dual boot computer, I run Linux Mint on a separate SSD, right now I am on Linux and I can't look at that option. My Linux system still works flawlessly, it goes to sleep when I get up and walk away from my computer. Since this problem with the sleep only began after the latest Microsoft update, I really can't see how an Intel driver would effect it, but I will look at it. If I can't fix this problem through a roll back, I am going to download the latest Windows 10 Preview and have a go at that.
Since then I've solved a variety of power problems for other people by disabling it. It is also called Intel power management interface engine and as far as I have found out it's supposd to work with BIOS and drivers to make everything work smoothly.
Did a bit of snooping.
Ran WindowsUpdateDiagnostic. It came back with a unfixable error Service registration is Missing. sfc /scannow in Admin mode goes to 12% and hangs.
Does it help? Of course I can go back to an earlier update and then restart from there.
I am trying to get my wife's Toshiba i3 running on Win 7 Pro up to Win 10 Pro so maybe this will take some time.