How can my parents spy on me on my laptop and what can i do?

I’m 25. I have my own laptop. And i experienced my parents read my notes or can see what I watching on YouTube.
I’m thinking about: ip address, Wi-Fi, email, Google, chrome, windows profile (words), or spying program?

Where save chrome and windows my passwords, bookmarks?

address can chrome email google ip address laptop own parents passwords privacy profile program spy spying thinking wi-fi windows youtube