> ## Documentation Index
> Fetch the complete documentation index at: https://help.sundevs.net/llms.txt
> Use this file to discover all available pages before exploring further.

# PC App (Windows)

> Run SunGuard on Windows with the SGL Launcher.

## Step 1: Install Java 21

1. Download Java 21 from the [Oracle website](https://www.oracle.com/java/technologies/javase/jdk21-archive-downloads.html) or [Adoptium](https://adoptium.net/).
2. Install it and verify by running this in Command Prompt:

```cmd theme={null}
java -version
```

## Step 2: Download SunGuard

<CardGroup cols={2}>
  <Card title="Download server.jar" icon="arrow-up-right-from-square" href="https://builtbybit.com/resources/sunguard-code-obfuscator.66409/">
    From BuiltByBit.
  </Card>

  <Card title="Download SGL Launcher" icon="download" href="https://1966745675-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FAkV3l0gOdni6Twie5DXS%2Fuploads%2F9hZyIsDZ6eFD17INImnS%2FSunguard%20Launcher%20V1.zip?alt=media&token=86733708-7658-4858-b250-94ff6ecf978d">
    Unzip to get `SGL.exe`.
  </Card>
</CardGroup>

Place `SGL.exe` and `server.jar` in the same directory, for example `C:\SunGuard`.

## Step 3: Run SunGuard

<Warning>
  The first start takes around **10 minutes**, because SunGuard downloads all the necessary dependencies.
</Warning>

1. Run `SGL.exe`.
2. Add your [license key](/license-key) to the newly created `license.txt` file.
3. The SunGuard GUI dashboard appears. Wait until the server starts.
4. Your browser opens and you can access SunGuard.

## Step 4: Use the dashboard

* Log in with username `admin` and password `admin`.
* Drag and drop your `.jar` files.
* Select your desired obfuscation settings.
* Click **Start Obfuscation**.

✅ You're all set! SunGuard is now ready to secure your `.jar` files.


## Related topics

- [SunGuard](/sunguard/overview.md)
- [Support](/support.md)
- [Run from Source](/sunpaste/installation.md)
- [JavaScript Projects](/sunlicense/product-integrations/javascript-projects.md)
- [Share Previews & Embeds](/sunlinks/dashboard/share-previews.md)