Fix GeForce NOW error code 0xC2720021 with this step-by-step guide. Learn how to resolve the “problem starting your session” issue on windows and mac device.
GeForce Now is a cloud gaming service developed by NVIDIA that allows users to stream and play PC games over the internet, without needing high-end gaming hardware.
What Is GeForce Now Error 0xc2720021?
GeForce Now error 0xc2720021 occurs when the GeForce Now application cannot successfully establish a connection with NVIDIA’s cloud servers. This results in a failure to start a gaming session, preventing users from accessing their cloud-based games.
The error code is often accompanied by phrases like “session start failure,” “cannot connect to GeForce Now,” or “GeForce Now error code 0xc2720021.”
Step 1: Check for GeForce Now Server Issues
The first thing to check when encountering GeForce Now error 0xc2720021 is whether NVIDIA’s servers are down. Sometimes, the error is entirely out of your control, and the problem lies with GeForce Now server issues.
How to Check Server Status:
Visit the official GeForce Now server status page: https://status.geforcenow.com/
If the servers are experiencing issues or undergoing maintenance, you may see GeForce Now session errors reported, or there may be an ongoing incident. In this case, the issue is temporary, and you simply need to wait for the GeForce Now connection error to be resolved by NVIDIA. You can also follow GeForce Now’s social media accounts for real-time updates on server status.
Step 2: Restart Your Router and Check Internet Connection
If the server is up and running, the issue could be with your internet connection. GeForce Now relies heavily on a stable and fast internet connection to stream games. A poor connection can trigger errors like GeForce Now not working, session start failure, and game streaming errors.
How to Fix Internet Connection Issues:
- Restart your modem/router: Power off your modem and router for at least 30 seconds, then turn them back on.
- Switch from Wi-Fi to Ethernet: A wired connection is more stable than Wi-Fi, reducing the chance of packet loss or high latency.
- Disable VPN: If you are using a VPN or proxy, it can interfere with the connection to GeForce Now servers. Temporarily disable these services and check if the issue persists.
- Test your internet speed: GeForce Now requires a minimum speed of 15 Mbps for 720p and 25 Mbps for 1080p. Check your connection speed using an online speed test.
Step 3: Update the GeForce Now App (Windows & macOS)
An outdated version of the GeForce Now app can lead to errors like 0xc2720021 GeForce Now. Updating to the latest version ensures that you’re running a bug-free version of the software that is compatible with the latest operating system updates.
How to Update GeForce Now on Windows:
- Open the GeForce Now app.
- If an update is available, the app will prompt you to install it.
- If you don’t receive a prompt, you can manually download the latest version from the official website:
https://www.nvidia.com/en-us/geforce-now/download/
How to Update GeForce Now on macOS:
- Open the GeForce Now app.
- Click on “Check for Updates” in the settings menu.
- Alternatively, download the latest version from NVIDIA’s website and replace the existing app.
Step 4: Reinstall GeForce Now to Fix Corrupted Files
If updating doesn’t fix GeForce Now error code 0xc2720021, the next step is to reinstall the application. Sometimes, corrupted installations can lead to game streaming errors or prevent GeForce Now from launching properly.
How to Reinstall GeForce Now on Windows:
- Go to Control Panel > Programs > Uninstall a Program.
- Uninstall GeForce Now.
- Restart your computer.
- Download the latest version from the official site and reinstall it.
How to Reinstall GeForce Now on macOS:
- Drag the GeForce Now app to the Trash.
- Empty the Trash and restart your Mac.
- Download and reinstall the app.
Reinstalling GeForce Now should eliminate any cloud gaming errors caused by corrupted app files.
Step 5: Adjust Firewall, Antivirus, and Network Security Settings
Firewalls and antivirus software can block GeForce Now from accessing the internet, resulting in errors like GeForce Now error on Windows or GeForce Now session error.
How to Adjust Settings:
- Whitelist GeForce Now in your firewall or antivirus software.
- Temporarily disable your antivirus software and check if the issue persists.
- Ensure that the following ports are open for GeForce Now:
- TCP: 443, 80
- UDP: 49003-49007
These steps should help resolve any GeForce Now connection issues caused by security software blocking the app.
Step 6: Try Another Device or Network
If the issue persists after checking the server, updating the app, and adjusting your firewall settings, it’s worth trying GeForce Now on a different device or network.
How to Test on Another Device:
- Try a mobile hotspot: If your home internet connection is unstable, try using a mobile hotspot to see if the error is related to your local network.
- Test on another device: Use GeForce Now on a different PC, Mac, or Android device. You can also try playing through a browser version of GeForce Now if available.
This step helps determine whether the issue lies with your device or local network, particularly if you’re experiencing GeForce Now problems on Android, GeForce Now error on PC, or browser-based GeForce Now session errors.
Step 7: Contact NVIDIA Support
If you’ve followed all the troubleshooting steps above and GeForce Now error 0xc2720021 persists, it may be time to reach out to NVIDIA support. They can provide additional guidance and help resolve any GeForce Now account issues or cloud gaming errors that might be affecting your session.
Visit the official NVIDIA GeForce Now help page for support:
https://www.nvidia.com/en-us/support/geforce-now/
If the issue persists despite your efforts, contacting NVIDIA GeForce Now support or checking with the community may provide further insights into the GeForce Now session error you are facing.
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