Fix VS Code Python Interpreter Not Showing or Selecting - Troubleshooting Windows Defender Security Center Won't Open-Cloudflare 521 Error After Update: Troubleshooting Guide

Updated 2026-06-13 12:30:37developer-tools
Fix VS Code Python Interpreter Not Showing or Selecting - Troubleshooting Windows Defender Security Center Won't Open-Cloudflare 521 Error After Update: Troubleshooting Guide
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.