update readme install

windows/README.md

@@ -2,6 +2,25 @@
 
 This folder contains the supported Windows 11 installation and start scripts for RC RaceCore.
 
+For a completely new computer, the shortest supported path is:
+
+```powershell
+winget install --id Git.Git --exact --source winget
+```
+
+Reopen PowerShell, then run:
+
+```powershell
+Set-Location $HOME
+git clone https://git.dio.nu/Public/Live_RC.git Live_RC
+Set-Location .\Live_RC
+.\windows\install.bat
+npm.cmd run status
+Invoke-RestMethod -Uri "http://127.0.0.1:8081/api/health"
+```
+
+Open `http://localhost:8081` when the health check returns `ok = True`. The sections below explain missing Git, ZIP installation, Node.js, firewall rules and troubleshooting.
+
 ## Supported runtime
 
 - 64-bit Windows 11 (`x64` or `arm64`)
@@ -11,6 +30,30 @@ This folder contains the supported Windows 11 installation and start scripts for
 
 Node.js 18 and 20 are not supported by the current native SQLite dependency.
 
+## Get the project files
+
+Git is needed only when you want to clone and later update with `git pull`. Check it in PowerShell:
+
+```powershell
+git --version
+```
+
+If Git is missing:
+
+```powershell
+winget install --id Git.Git --exact --source winget
+```
+
+Reopen PowerShell, then clone the raw URL without Markdown brackets:
+
+```powershell
+Set-Location $HOME
+git clone https://git.dio.nu/Public/Live_RC.git Live_RC
+Set-Location .\Live_RC
+```
+
+Without Git, download the ZIP archive from [the public repository](https://git.dio.nu/Public/Live_RC) and extract the complete project. The project root must directly contain `package.json`, `server.js`, `src\`, and `windows\`.
+
 ## Recommended installation
 
 1. Extract or clone the complete repository, preferably to a short path such as `C:\Live_RC`.