Make sure that Chrome isn't optioned to open all your taskbar websites upon open, recheck the Chrome "tools" settings, etc.. Of course, google for any Chrome problems that are similar. I use Chrome and never had that happen. I did however hit open my bookmarks by mistakes to all and it took off, not good. Upon closing and reopening that cleared, however if caught in a glitch it maybe repeating the task. You may want to de-install Chrome totally. You can save your bookmarks to some HMTL file to re-import next when you re-install Chrome. I use REVO uninstaller to best handle that, though the typical add/remove pgm. could do as well. It's just that Revo removes entirely(advanced mode) and flushes it all out.
You can try to use a "restore point" from a date prior to all this happening and see if that works, but a month later, you'll probably repeat MS updates, etc., again. It's an option to look into.