Antivirus Flags?
Don't worry, ETT is safe. Windows Defender just gets a little overprotective sometimes.
False Positive Warning
ETT is obfuscated to protect its source code. Because of this, Windows Defender (and some other AVs) may incorrectly flag it as a threat or "unknown software".
This is completely normal for advanced system modification tools. We do not include malware. You may need to temporarily disable Real-time protection to install.