Even the very first Windows 10 version was deleting files on hard drive, if they were false positives of Windows Defender. I remember fighting it for a few hour

Even the very first Windows 10 version was deleting files on hard drive, if they were false positives of Windows Defender. I remember fighting it for a few hours once when I needed to run some (safe) utility (I compiled), but which was disappearing within seconds after Windows Defender ran scan on it. IIRC it was very difficult to find settings where you could completely disable Windows Defender.