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Home / developer-tools / Windows 11 Installation Assistant Stuck at 99%: Fixes That Work - Fix NXDOMAIN Error When Using Custom DNS Server-Fix Windows 11 Installation Assistant Stuck at 99%

Windows 11 Installation Assistant Stuck at 99%: Fixes That Work - Fix NXDOMAIN Error When Using Custom DNS Server-Fix Windows 11 Installation Assistant Stuck at 99%

Updated 2026-07-28 11:40:54developer-tools
Windows 11 Installation Assistant Stuck at 99%: Fixes That Work - Fix NXDOMAIN Error When Using Custom DNS Server-Fix Windows 11 Installation Assistant Stuck at 99%
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.

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