Valorant Error van-73 means your Windows build is too old for Vanguard to operate. Riot requires Windows 10 build 18362 (version 1903) as the absolute minimum. Windows 7, 8, and early Windows 10 builds are not supported.
Usually client-sideLast verified: 2026-08-19
Update Windows
Go to Settings > Windows Update and install all available updates. After updating, restart and try Valorant again. If Windows Update shows you are fully updated but still on an unsupported build, check your Windows edition (Home, Pro) for update branch support.
Check your Windows version
Press Windows key + R, type winver, and press Enter. The dialog shows your Windows version and build number. You need Build 18362 or higher.
How to fix step by step
- 1Press Win + R, type winver, confirm you are on Windows 10 Build 18362 or later (or Windows 11)
- 2Go to Settings > Windows Update > Check for updates and install everything available
- 3Restart after updating and relaunch Valorant
How VAN-73 differs from related codes
- Error VAN-81: Valorant lost connection to Riot services during login or queue. (server or client)
- Error VAN-61: Valorant's Vanguard anti-cheat requires Secure Boot to be enabled in your BIOS/UEFI. Your system has Secure Boot disabled, preventing Vanguard from loading. (usually client-side)
- Error VAN-9003: Valorant could not connect to Riot services or complete Vanguard checks. (server or client)