To download World of Warcraft Classic, you will need to create a Battle.net account and download the Battle.net desktop app. Once you have created an account and downloaded the app, you can follow these steps to install World of Warcraft Classic:

1. Open the Battle.net desktop app.
2. Click on the “World of Warcraft” icon.
3. Click on the “Install” button.
4. Follow the on-screen instructions to complete the installation.

Once the installation is complete, you can launch World of Warcraft Classic by clicking on the “Play” button in the Battle.net desktop app.

Here are some additional requirements for playing World of Warcraft Classic:

• Operating system: Windows 7 or later, macOS 10.12 or later
• Processor: Intel Core 2 Duo or AMD Phenom II X3
• Memory: 4GB
• Graphics card: NVIDIA GeForce GTX 460 or AMD Radeon HD 5850
• DirectX: Version 9.0c
• Internet connection: Broadband internet connection

If you are unsure if your computer meets the minimum system requirements, you can check the Blizzard website.

Once you have installed World of Warcraft Classic, you can create your character and start exploring the world of Azeroth.