If you want to view your desktop, reply to Discord messages, or monitor system performance while in VR, you do not need a modified VRChat client. Use free, EAC-compliant SteamVR overlays:

The VRChat client free is a version of the VRChat platform that allows users to experience the platform without paying a dime. While it's not a fully-featured version of the platform, the VRChat client free still offers a wide range of features and experiences.

(third-party software used to add features like "anti-crash" or flight, though these are often against the Terms of Service). Developer tools for testing worlds in Unity). Which of these are you interested in? World Client Review: The Best Free VRChat Tool

If you are looking for a custom client to fix performance issues, there are safe, developer-approved ways to boost your game without risking a ban. Open-Source VR Tools

Open the Meta Quest Store inside your headset, search for VRChat, and click download.

For full immersion, the PC client supports major virtual reality headsets connected to a gaming computer, including: Valve Index