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+# Build OpenROAD on Windows Using Docker
+
+This guide walks you through installing and running OpenROAD on Windows using Docker Desktop with an Ubuntu 22.04 container.
+
+## Prerequisites
+
+- Windows 10 (version 2004+) or Windows 11
+- [Docker Desktop](https://www.docker.com/products/docker-desktop/) (WSL2 backend enabled)
+- At least 16GB RAM (8GB minimum usable)
+- At least 50GB free disk space
+
+## Step 1 — Install and Configure Docker Desktop
+
+1. Download and install [Docker Desktop for Windows] (https://www.docker.com/products/docker-desktop/)
+2. During setup, enable **WSL 2 backend**
+3. After installation, open Docker Desktop -> Settings -> Resources:
+   * Memory: ≥ 8GB
+   * CPUs: ≥ 4
+4. Go to the Settings -> Resources -> WSL Integration -> Enable for Ubuntu-22.04
+   
+Verify installation (run in PowerShell):
+```
+docker run -rm hello-world
+```
+
+## Step 2 — Start an Ubuntu 22.04 Container
+
+Run in **PowerShell**:
+```bash
+docker run -it ubuntu:22.04
+```
+
+This opens an interactive Ubuntu terminal inside Docker.
+
+> **Note:** All following commands run **inside this Docker container**
+> unless stated otherwise.
+
+## Step 3 — Avoid Timezone Prompt
+
+Before running any `apt-get` command, set this to avoid interactive prompts:
+```bash
+export DEBIAN_FRONTEND=noninteractive
+export TZ=UTC
+
+apt-get update
+apt-get install -y tzdata
+```
+
+## Step 4 — Download and Install OpenROAD Binary
+
+Download the prebuilt `.deb` file for Ubuntu 22.04 from [Precision Innovations releases](https://vaultlink.precisioninno.com/).
+
+Copy it from Windows into the running container (run in **PowerShell**):
+```powershell
+# First get your container ID
+docker ps
+
+# Copy the file into the container
+docker cp "C:\Users\<YourUsername>\Downloads\openroad_<version>_amd64-ubuntu-22.04.deb" <container_id>:/root/
+```
+
+Install it inside the container:
+```bash
+cd /root
+apt-get install -y ./openroad_<version>_amd64-ubuntu-22.04.deb.deb
+```
+
+Verify:
+```bash
+openroad -version
+```
+
+## Step 5 — Install Correct Yosys Version
+
+The default apt version of Yosys is too old (0.9). ORFS requires Yosys >= 0.58.
+Install OSS CAD Suite which includes a compatible version:
+```bash
+apt-get install -y wget
+cd /root
+
+wget https://github.com/YosysHQ/oss-cad-suite-build/releases/download/2025-03-01/oss-cad-suite-linux-x64-20250301.tgz
+tar -xzf oss-cad-suite-linux-x64-20250301.tgz
+
+source /root/oss-cad-suite/environment
+yosys --version
+```
+
+To make yosys available permanently across sessions:
+```bash
+echo 'source /root/oss-cad-suite/environment' >> ~/.bashrc
+source ~/.bashrc
+```
+
+> **Important:** Always use a pinned version of OSS CAD Suite.
+> ORFS does not guarantee compatibility with `latest`.
+
+## Step 6 — Fix Line Endings (CRLF Issue)
+
+Run in **PowerShell** before cloning:
+```powershell
+git config --global core.autocrlf false
+git config --global core.eol lf
+```
+
+## Step 7 - Clone OpenROAD Flow Scripts 
+
+Run inside the container:
+```bash
+apt-get install -y git
+git clone https://github.com/The-OpenROAD-Project/OpenROAD-flow-scripts.git
+cd OpenROAD-flow-scripts
+```
+
+Checkout the version matching your OpenROAD binary:
+```bash
+git checkout 26Q1
+```
+
+> **Important:** Always match the ORFS version tag with your OpenROAD binary.
+> Mismatched versions cause errors like:
+> `invalid command name "sta::endpoint_count"`
+
+## Step 8 - Set Environment Variables
+
+Run inside the container for every new session:
+```bash
+source /root/oss-cad-suite/environment
+export OPENROAD_EXE=$(command -v openroad)
+export YOSYS_EXE=$(command -v yosys)
+```
+
+> **Note:** These variables reset every time you start a new container session.
+> Use `docker commit` (Step 10) or add them to `~/.bashrc` to make permanent.
+
+## Step 9 — Install Remaining Dependencies
+```bash
+apt-get install -y make time python3-pip
+pip3 install pyyaml
+```
+
+## Step 10 — Run Example Design
+```bash
+cd /OpenROAD-flow-scripts/flow
+make DESIGN_CONFIG=./designs/nangate45/gcd/config.mk
+```
+
+This runs the full RTL-to-GDSII flow on the `nangate45/gcd` example.
+It will take 10-20 minutes. Output files will be in:
+
+- `flow/logs/nangate45/gcd/base/` — log files for each stage
+- `flow/reports/nangate45/gcd/base/` — timing and design reports
+- `flow/results/nangate45/gcd/base/` — result files including `6_final.*`
+
+## Step 11 — Persist Your Container (Optional)
+
+To save your setup so you don't repeat installation next time
+(run in **powershell**):
+```powershell
+docker commit  openroad-windows:latest
+```
+
+Next time, start directly with:
+```powershell
+docker run -it openroad-windows:latest
+```
+
+## Common Issues
+
+- Yosys version too old: Use OSS CAD Suite (Step 5)
+- `apt-get` timezone prompt: Set `DEBIAN_FRONTEND=noninteractive` (Step 3)
+- Environment variables lost: Re-run Step 8 every new session or add to `~/.bashrc`
+- Version mismatch errors: Run `git checkout 26Q1` after cloning (Step 7)
+- Slow Docker performance: Use WSL path `\\wsl$\Ubuntu\` instead of `C:\`
+- Disk space full on C: drive: Move WSL to another drive using `wsl --export / wsl --import` 
+- GUI not working: Use `docker run -it -e DISPLAY=<YOUR_IP>:0.0 openroad/orfs` 
+- CRLF line ending errors:  Run `git config --global core.autocrlf false` (Step 6) 
+
+## Optional: WSL2 Native Build
+
+For better performance, you can install OpenROAD natively on WSL2
+without Docker. See: [BuildWithWSL.md](BuildWithWSL.md)