ELI5 What is the process people use to find new vulnerabilities on operating systems like windows 10?

I am interested in cybersecurity and I was wondering how people dig into operating systems and try to find vulnerabilities. Where exactly do they look? by HowToHack on Reddit.com ELI5 What is the process people use to find new vulnerabilities on operating systems like windows 10? - I am interested in cybersecurity and I was wondering how people dig into operating systems and try to find vulnerabilities. Where exactly do they look?

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