Latest League of Legends Vanguard Issues: Error Van 57 Outbreak and Fixes
When the vgc process repeatedly terminates seconds after manual execution, a third-party application or network barrier is likely killing the thread. Kernel-level anti-cheat programs maintain zero tolerance for software that inspects active game processes. Monitoring utilities, hardware overclocking suites like MSI Afterburner, macro tools, and aggressive third-party antivirus shields are the most frequent offenders.
To eliminate conflicting background software, perform a targeted clean boot. Open the Run prompt, execute msconfig, and head to the Services tab. Check the box labeled Hide all Microsoft services. This step is critical; skipping it can disable core Windows functionality. In the filtered list, leave vgc checked, but click Disable all for the remaining entries. Navigate to the Startup tab, open Task Manager, disable all third-party startup apps, and restart your computer. If League loads without error VAN 57, re-enable your software piece by piece to identify the offending program.
Simultaneously, verify that Windows Defender Firewall is not severing communication with Riot's security validation servers. Navigate to Control Panel > System and Security > Windows Defender Firewall > Allow an app or feature through Windows Defender Firewall. Click "Change settings," then verify that both vgc.exe (typically located in C:\Program Files\Riot Vanguard) and LeagueClient.exe have their Private and Public checkboxes filled. Without reciprocal firewall permissions, Vanguard fails its socket handshake and defaults to a hard shutdown.
