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+# Windows Setup and Troubleshooting Guide
+
+This guide provides Windows-specific setup instructions and troubleshooting for jcode users on Windows 10/11.
+
+## Installation
+
+### Quick Install (PowerShell)
+
+```powershell
+irm https://raw.githubusercontent.com/1jehuang/jcode/master/scripts/install.ps1 | iex
+```
+
+### Installation Details
+
+The PowerShell installer:
+- Downloads the latest jcode release for your architecture (x86_64 or ARM64)
+- Installs to `%LOCALAPPDATA%\jcode\bin\jcode.exe` (launcher)
+- Stores versioned binaries in `%LOCALAPPDATA%\jcode\builds\versions\<version>\jcode.exe`
+- Adds the installation directory to your user PATH
+- Optionally installs Alacritty terminal emulator
+- Optionally sets up Alt+; global hotkey to launch jcode
+
+### Manual Installation
+
+If the automated installer fails:
+
+1. Download the appropriate release from [GitHub Releases](https://github.com/1jehuang/jcode/releases)
+2. Extract `jcode.exe` to a directory of your choice
+3. Add that directory to your system PATH
+4. Verify installation: `jcode --version`
+
+## Configuration Locations
+
+Windows-specific configuration paths:
+
+| File/Directory | Windows Path |
+|----------------|--------------|
+| Main config | `%USERPROFILE%\.jcode\config.toml` |
+| Auth credentials | `%USERPROFILE%\.jcode\auth.json` |
+| Provider env files | `%APPDATA%\jcode\` |
+| Build artifacts | `%LOCALAPPDATA%\jcode\builds\` |
+| Browser components | `%LOCALAPPDATA%\jcode\browser\` |
+| Logs | `%USERPROFILE%\.jcode\logs\` |
+
+## Login and Authentication
+
+### CLI Login (Recommended for Windows)
+
+The CLI provides flags to avoid interactive TUI issues:
+
+```powershell
+# OpenAI-compatible provider with all options
+jcode login --provider openai-compatible --api-base https://api.deepseek.com --model deepseek-v4-flash --api-key YOUR_API_KEY
+
+# Skip API key prompt (will prompt securely)
+jcode login --provider openai-compatible --api-base https://api.deepseek.com --model deepseek-v4-flash
+```
+
+Available login flags:
+- `--provider <PROVIDER>`: Provider to use (openai, claude, openrouter, etc.)
+- `--api-base <URL>`: OpenAI-compatible API base URL
+- `--api-key <KEY>`: API key (omitted = secure prompt)
+- `--model <MODEL>`: Model to use
+- `--account <LABEL>`: Account label for multi-account support
+- `--no-browser`: Skip browser OAuth (for headless/SSH)
+- `--json`: Machine-readable JSON output for scripting
+
+### Handling Credential Conflicts
+
+jcode may detect credentials from other tools (OpenCode, Codex, etc.):
+
+```
+Found existing OpenRouter credentials from OpenCode auth.json at C:\Users\...\auth.json.
+jcode will only read that source in place after you approve it.
+Trust this auth source for future jcode sessions? [y/N]:
+```
+
+Type `y` to approve, or manage credentials manually in the config locations listed above.
+
+### TUI Login
+
+If using the TUI `/login` command:
+- Use arrow keys or type to select providers (mouse support varies by terminal)
+- Press Enter to confirm selection
+- Follow the prompts for your chosen provider
+
+## Terminal Compatibility
+
+### Recommended Terminals
+
+- **Alacritty**: Excellent compatibility, installed automatically by default
+- **Windows Terminal**: Good compatibility, use with PowerShell or pwsh
+- **PowerShell 7**: Recommended over Windows PowerShell 5.1
+- **Git Bash**: Works well for Unix-style workflows
+
+### Terminal Issues
+
+If you experience:
+- **Cursor positioning problems**: Try a different terminal (Alacritty recommended)
+- **Colors not displaying**: Ensure your terminal supports 256-color mode
+- **Input lag**: Check terminal performance settings
+
+## Known Windows Issues
+
+### Issue #82: Login Flow Problems
+
+**Symptoms**: API key input fails, unclear TUI selection, shows OpenCode docs
+
+**Workaround**: Use CLI login with flags (see "CLI Login" above)
+
+**Status**: Partially addressed with `--api-base`, `--api-key`, `--model` flags
+
+### Issue #118: Installer Architecture Error
+
+**Symptoms**: "Unsupported architecture" error during installation
+
+**Workaround**: Ensure you're using PowerShell 5.1+, check your architecture with `$env:PROCESSOR_ARCHITECTURE`
+
+### Issue #140: Browser Setup Missing Binary
+
+**Symptoms**: `jcode browser setup` fails with "Host binary not found"
+
+**Status**: Firefox Agent Bridge native messaging host not included in Windows releases
+
+**Workaround**: Browser automation currently not available on Windows
+
+## Troubleshooting
+
+### Installation Issues
+
+**Problem**: `jcode` command not found after installation
+- **Solution**: Open a new terminal window (PATH changes require new session)
+- **Alternative**: Add `%LOCALAPPDATA%\jcode\bin` to PATH manually
+
+**Problem**: Installation fails with "PowerShell 5.1 or later required"
+- **Solution**: Update PowerShell or use Windows Terminal with PowerShell 7
+
+**Problem**: Download fails or times out
+- **Solution**: Manually download from GitHub Releases and extract
+
+### Authentication Issues
+
+**Problem**: "No models are available" after login
+- **Solution**: Check that your API key is valid and the model name is correct
+- **Solution**: Run `jcode auth-test` to verify credentials
+
+**Problem**: Credential conflicts with other tools
+- **Solution**: Approve the credential source when prompted, or manage credentials manually
+
+**Problem**: OAuth flow fails or browser doesn't open
+- **Solution**: Use `--no-browser` flag and copy-paste the auth URL manually
+
+### Runtime Issues
+
+**Problem**: jcode won't start or crashes immediately
+- **Solution**: Check logs in `%USERPROFILE%\.jcode\logs\`
+- **Solution**: Ensure Windows Defender isn't blocking the executable
+- **Solution**: Try running as administrator (not recommended for regular use)
+
+**Problem**: Slow performance or high memory usage
+- **Solution**: This is expected for local embeddings; disable with config if needed
+- **Solution**: Close other sessions to reduce memory footprint
+
+**Problem**: File permission errors
+- **Solution**: Windows file permissions work differently than Unix; most operations are no-ops on Windows
+
+## Getting Help
+
+If you encounter issues not covered here:
+
+1. Check existing [GitHub Issues](https://github.com/1jehuang/jcode/issues) for similar problems
+2. Search for your error message in the issue tracker
+3. File a new issue with:
+   - Your Windows version and architecture
+   - jcode version (`jcode --version`)
+   - Terminal type (PowerShell, Windows Terminal, etc.)
+   - Full error message and reproduction steps
+   - Relevant logs from `%USERPROFILE%\.jcode\logs\`
+
+## Additional Resources
+
+- [Windows Architecture Notes](WINDOWS.md) - Technical implementation details
+- [CONTRIBUTING.md](../CONTRIBUTING.md) - Contribution guidelines
+- [GitHub Issues](https://github.com/1jehuang/jcode/issues) - Bug reports and feature requests