To provide you with the most accurate and helpful information regarding downloading AI software on a PC, could you please specify what kind of AI application or software you're looking for? Are you interested in:

1、General AI assistants like virtual assistants?
2、AI for specific tasks such as image editing, music generation, or language translation?
3、AI development tools for creating your own AI models or applications?
4、AIpowered games or entertainment software?

Additionally, knowing your operating system (Windows, macOS, Linux) can also help in providing a more tailored response.

Here are a few popular AI applications and resources for PCs across various categories:

General AI Assistants
Microsoft Cortana: Available for Windows.
Google Assistant: Can be accessed via web or through specific apps.

AI for Specific Tasks
Adobe Photoshop with AI features for image editing (Windows, macOS).
Amper Music for AIgenerated music (Windows, macOS).
DeepL for AIpowered translation (Windows, macOS, Linux).

AI Development Tools
TensorFlow by Google: An opensource software library for numerical computation (Windows, macOS, Linux).
PyTorch: Another popular opensource machine learning library (Windows, macOS, Linux).

AIpowered Games and Entertainment
There are numerous games that incorporate AI、Specific titles can vary widely, so it might be helpful to look into gaming forums or platforms like Steam or GOG for the latest AIpowered games.

To download any of these or other AIrelated software, follow these general steps:

1、Visit the Official Website: Go to the official website of the software you're interested in.
2、Check System Requirements: Ensure your PC meets the minimum system requirements for the software.
3、Download: Look for a download button or link on the website、Be cautious of thirdparty download sites to avoid malware.
4、Install: Once downloaded, run the installer and follow the installation instructions.
5、Activate or Register: Some software may require activation or registration、Follow the provided instructions for this step.

If you have a specific AI application in mind or more details about your requirements, feel free to ask, and I'll do my best to guide you through the process!