Troubleshooting

RivaTuner is an overclocking and hardware monitoring system for Windows devices that is used to enhance GPU performance. At this point, it is outdated, with the last stable version being released in 2009. We have found that if you have RivaTuner installed on your device, ProtonVPN will not open. To […]

The ProtonVPN symbol in the Windows systems tray serves as a shortcut to the application. To quickly establish a VPN connection, right click on the icon and press Connect.   Tip: when ProtonVPN is minimized, you can also connect by using the Quick Connect button.     Related questions How […]

In cases ProtonVPN can’t connect, please refer to the following list of solutions. Most of the steps described here can be done without direct support from our support team, but in case you get stuck or don’t know how to handle certain things, we will be there for you. Server […]

The Quick Connect function connects you to your default profile with one click. If you have not changed it, your default profile will be the “Fastest” profile. The “Fastest” profile will establish the fastest and most stable connection depending on your location, distance to nearest server and server load.   […]

Having connectivity issues with the ProtonVPN Windows client? Read on for a checklist of things to solve your situation. For Windows, ProtonVPN is available in the form of our own ProtonVPN Windows application. It provides the easiest to use interface and you can connect with just a single click. However, […]

The ProtonVPN apps for Android, iOS, and Windows as well as our Linux command line tool allow you to use two different transmission protocols depending on your situation. This article explains when to use each protocol and how to switch between them. These ProtonVPN apps can use the OpenVPN VPN […]

In this article, we discuss the factors that impact the speed of VPN connections and how you can increase the speed of your connection when using one of our VPN servers. We also cover the differences in speed between the ProtonVPN plans. All VPNs establish an encrypted tunnel over your […]

If the base filtering engine (BFE) is not running on your Windows device, the ProtonVPN app will show the following error messages: The most likely reason the BFE is not running is that a virus disabled it to perform malicious actions on your device. For ProtonVPN to work properly, you […]

We have been contacted by users reporting that their iPhone is telling them that they are using unexpectedly large amounts of data when using their mobile data plan while connected to ProtonVPN. We have found that the cause of this unexpected data use is an accounting issue with iOS 14. […]

VPN Connection fails due to an authentication failure Symptom: Opening and logging in to the ProtonVPN Android app is successful. However, when you try to connect to a server, the connection fails and returns the error message “User authentication failed”. The Android application logs indicate “AUTH_FAILED”. (You can access your […]