Windows 11 Installation Assistant Stuck at 99% Due to Antivirus - Windows 11 Blue Screen After Update: Recovery Guide-How to Identify Extensions Causing ERR_CONNECTION_RESET

Updated 2026-07-28 13:45:16windows-fixes
Windows 11 Installation Assistant Stuck at 99% Due to Antivirus - Windows 11 Blue Screen After Update: Recovery Guide-How to Identify Extensions Causing ERR_CONNECTION_RESET
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.