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Fix npm run build Failed with PostCSS Error - Windows Security App Disappeared from Start Menu-Windows Update Stuck Error 0x800f081f Solution

2026-07-28 10:12:58
Fix npm run build Failed with PostCSS Error - Windows Security App Disappeared from Start Menu-Windows Update Stuck Error 0x800f081f Solution

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

Next references

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