I also have Linux Mint v18.3, and shut down all MS Updates the day support ended.
I use W7 for most of my Internet browsing. W10 for only financial transactions, but I’ll be migrating to Linux Mint 20.1 to do all that soon. The reason W10 will be on my computer is if I absolutely have to use it for some unknown reason. So in effect I have a tri-boot computer, W7, W10 and Linux.