I saw lots of different windows open: bit defender, malware bytes, web browser with different searches, my onedrive folder and many others. I opened my laptop and was shocked to see what's going on. After some time I heard it again and decided to look what's going on. In a while I heard the famous windows 'ding, ding' sound for a few times but didn't pay any attention. I closed my laptop without locking the screen, assuming it's going to lock by itself.