Thus, if you used to run Riot Client in normal mode but now trying to run it in administrator mode, then most likely it won’t launch because there are no configurations saved in an admin AppData folder, such as JSON files, cookies, logs files, etc.

1. Prevent Riot Client from running as an administrator 

Running programs as an administrator often resolves issues where the firewall interferes and blocks the application from opening. However, this case is a little different because it s all about the configurations saved in the AppData folder. Appdata is a folder that is used to save the configurations of programs such as cookies, log files, config files and etc. So, if you don’t use an administrator account to open Riot Client, that means there are no config files saved in the admin app data folder, which is why Riot Client is not launching. To fix this, just uncheck the option Run this program as an administrator from the compatibility settings. To do so, follow the steps:

2. Make sure the Riot Client process is not running in the background

In some cases, applications or programs don’t appear on the screen even though they are already running in the background. This mainly happens when you try to open an application multiple times by double-clicking on it.

3. Change Compatibility Settings

Sometimes Riot Client refuses to launch with the current compatibility settings of Windows. In this case, we can try changing its compatibility settings. Compatibility settings allow users to disable Windows full-screen optimization and run the program with the old version of Windows. It also includes other features, but those are not relevant in this case. Full-Screen Optimization is a Windows feature included in the compatibility settings. This feature is enabled by default and used to optimize the application, which improves overall performance if the application is running in full-screen mode. However, in some cases, full-screen optimization conflicts with built-in application optimization, which results in various different issues such as crashing, not launching, and stuttering. Hence, disable full-screen optimization and try running Riot Client with an old version of Windows.

4. Disable Third-Party Antivirus Software

If you are using any third-party antivirus software, it is possible that your antivirus is preventing the Riot Client from opening. Sometimes, third-party antivirus software interferes and blocks the application’s executable file (EXE) for no reason. Hence, try temporarily disabling your third-party antivirus software. To disable the third-party antivirus software, follow the steps. The following may vary depending on the antivirus you are using.

5. Allow Riot Client from the Windows Firewall

Windows Firewall is a built-in component of Windows defender. It is used to monitor outgoing and incoming data to prevent unauthorized access. However, in some cases, the Windows firewall blocks the programs from launching. Hence, allow Riot Client from Windows Firewall settings to see whether it helps or not. To allow Riot Client from the firewall settings, follow the steps:

6. Re-install Riot Client Launcher

The final solution is to reinstall the Riot Client launcher, as it is possible that some application files get corrupted, which is why Riot Client is not opening. To fix this, just reinstall the Riot Client launcher by following the steps.

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