Uninstall your current launcher, download the Minecraft Launcher from the Microsoft Store , and add it to Windows Defender’s exclusion list. This combination eliminates 99% of Error 437 triggers.
| Fix | Success Rate | Difficulty | |------|-------------|------------| | Run as Administrator | 35% | Easy | | Disable Antivirus | 60% | Easy | | Clear Launcher Cache | 80% | Medium | | Reinstall via Microsoft Store | 95% | Medium | | Switch to Prism Launcher | 99% | Medium |
Click Allow an app or feature through Windows Defender Firewall .
Restart the launcher and try the download again. Solution 2: Clear the Minecraft Launcher Cache Corrupted cache is a prime suspect for Error 437 Download UPD. Wiping it forces a fresh download.
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