Windows & BSOD · high

How to fix802-1X-AUTH-FAIL

802.1X authentication failure on enterprise Wi-Fi

What this error means

802.1X authentication failure on enterprise Wi-Fi ranks as a high-severity Windows operating system issue in our database. Cannot connect to corporate or university Wi-Fi that uses 802.1X (RADIUS) authentication. Windows prompts for credentials repeatedly. The usual suspects are expired or untrusted certificate on the client and network Policy Server (NPS) rejecting connection. Follow the steps below to fix it.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Import the correct CA certificate from IT department

Import the correct CA certificate from IT department.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Delete the existing Wi-Fi profile and reconnect, entering the correct credentials

Delete the existing Wi-Fi profile and reconnect, entering the correct credentials.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Verify the RADIUS server certificate is valid

Verify the RADIUS server certificate is valid.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • Expired or untrusted certificate on the client
  • Wrong EAP type configured in Wi-Fi profile
  • Network Policy Server (NPS) rejecting connection