Interesting... I've used ShutUp10 for quite a while now, on Windows 10 Home, and not had these issues to my knowledge. Perhaps it's a placebo and I don't notice.
Is that PC on all the time? If so, try running Winver in a command prompt and see what it says. Maybe run it anyway and see what it says.
I was given a 10 Pro pc a while back, and I had to change several registry settings. Sometimes, I have to run the program that I work on overnight and/or over the weekend - and 10 was nicely rebooting my PC for me to apply updates even when I was logged on with my computer running a program.
For me, it was obvious that an update was in progress because when I turned it on after having connected to a public WiFi hot spot in a lack of internet at home crisis
it immediately started updating. I suspect that its unlikely that you would not have noticed an update had taken place.
I posted a few months back on TPU a comment about using ShutUp10 to kill updates and someone replied that it was not working for them. This was before I knew for sure it was not preventing updates on my laptop - as I rarely connect the laptop to the internet.
I can't speak to the condition of the person's PC who replied to my comment on TPU, however, the fact it did not work may be due to some of the things I tried on my laptop.
For one, I lacked an understanding of the proper way to get GPEdit on the PC and installed a copy that I got elsewhere. On top of that, I had disabled the services per my post here -
https://www.techspot.com/community/...me-to-reboot-for-updates.248051/#post-1695440
I then re-enabled them after I set ShutUp10 - I think I rechecked the settings in ShutUp10 after re-enabling those services and they were set properly. So perhaps the fact it did not work, was due to my modifications, or maybe it was even due to my rarely connecting it to the internet. Honestly, I do not know.