Last Updated: October 2023
Difficulty: Moderate
System: Windows 10/11, Windows Server

Generally, no. Legitimate software errors are not distributed as standalone .exe files named after HTTP status codes. If you see a pop-up urging you to download error_408.exe to "fix your computer," it's likely:

Do not click such links or run the file.

Open Command Prompt as Administrator and run:

ipconfig /flushdns
ipconfig /release
ipconfig /renew
netsh int ip reset
netsh winsock reset

Restart your PC afterward.