docs(windows): document uv.exe AV false positive

README.md

@@ -64,6 +64,41 @@ source ~/.bashrc    # reload shell (or: source ~/.zshrc)
 hermes              # start chatting!
 ```
 
+### Troubleshooting
+
+#### Windows Defender or antivirus flags `uv.exe` as malware
+
+If your antivirus (Bitdefender, Windows Defender, etc.) quarantines `uv.exe` from the Hermes `bin` folder (`%LOCALAPPDATA%\hermes\bin\uv.exe`), this is a **false positive**. The file is Astral's `uv` — the Rust Python package manager Hermes bundles to manage its Python environment. ML-based antivirus engines commonly flag unsigned Rust binaries that download and install packages.
+
+**To verify your copy is authentic:**
+
+```powershell
+# Install GitHub CLI if needed
+winget install --id GitHub.cli
+
+# Login to GitHub
+gh auth login
+
+# Run verification
+$uv = "$env:LOCALAPPDATA\hermes\bin\uv.exe"
+$ver = (& $uv --version).Split(' ')[1]
+[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
+$zip = "$env:TEMP\uv.zip"
+Invoke-WebRequest "https://github.com/astral-sh/uv/releases/download/$ver/uv-x86_64-pc-windows-msvc.zip" -OutFile $zip -UseBasicParsing
+gh attestation verify $zip --repo astral-sh/uv
+Expand-Archive $zip "$env:TEMP\uv_x" -Force
+(Get-FileHash "$env:TEMP\uv_x\uv.exe").Hash -eq (Get-FileHash $uv).Hash
+```
+
+If attestation says "Verification succeeded" and the last line prints `True`, you're good.
+
+**To whitelist Hermes:**
+- **Windows Defender:** Run PowerShell as Admin → `Add-MpPreference -ExclusionPath "$env:LOCALAPPDATA\hermes\bin"`
+- **Bitdefender:** Add an exception in the Bitdefender console (Protection > Antivirus > Settings > Manage Exceptions)
+- Whitelist the **folder**, not the file hash — Hermes updates `uv` and the hash changes every version
+
+For more context, see the upstream Astral reports: [astral-sh/uv#13553](https://github.com/astral-sh/uv/issues/13553), [astral-sh/uv#15011](https://github.com/astral-sh/uv/issues/15011), [astral-sh/uv#10079](https://github.com/astral-sh/uv/issues/10079).
+
 ---
 
 ## Getting Started