Unfortunately, Windows Defender isn't easy to remove. Personally...I don't like it and never recommend it's use. You can turn it off and keep it off however by going to Services and stopping it there and then change it's start up type to Disabled. Then it "shouldn't" restart. I said should because as you and I have found out this may not be the case.
I would like you to manually update MBA-M by downloading the manual update file to the flash drive, take it to the computer and install the updates from the flash drive. Then do a full scan with MBA-M and of course have it remove everything found, REBOOT the computer with your newly purchased spam boots :icon_lol:, sorry, couldn't resist,
Ahem...sericously, reboot the computer and come back here with the new log.
Here's the link for the manual update for MBA-M. It ususally is slightly behind the regular downloaded updates but hopefully an update with a higher database than you have.
The last one you showed was 5173 and as of just now the latest one is 5194. Hopefully you will get something in between. If it is older than the one you have, don't use it.