I have an Acer Aspire ES1-512 using Windows 10.0.16299. Recently I learned how to look at all the successful logins using Event Viewer -> Windows Logs -> Custom Logs, and typing in the code for successful logins, 4624. To my surprise, I'm getting one every few minutes! Does any one know if that means someone's hacking into my system every few minutes, or is there a more innocent explanation?