Windows Defender stopping me from ejecting harddrive

After uninstalling Norton (as it came preinstalled after on my computer) I started to experience an issue, whenever I would try to eject my hard drive I would get an error, after looking in event viewer I saw an error talking about how msmpeng.exe was stopping it from ejecting. After researching I found out that this task was windows defender.

However I have tried everything to stop this from happening to no avail, Ive gone into its settings to turn it off and yet it still runs in the background still blocking be from ejecting my hard drive, attempting to close msmpeng.exe in task manager gives me an error that I dont have permission (with no way to change this) I have then followed guides about going into edit to make a file called disablelivespywareprotection (something like that) and now Im out of answers, Am I now forced to just unplug it unsafely or something? please help