Windows & BSOD · high

How to fix 802.1X authentication failure on enterprise Wi-Fi

Error code: 802-1X-AUTH-FAIL

What this error means

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.

Updated

Before you begin

Save open work and back up important files. Use instructions for your exact device and software version. If Windows cannot start, see the startup guide.

Work through these checks

0 of 3 complete
01Import the correct CA certificate from IT department
  1. Import the correct CA certificate from IT department
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors
02Delete the existing Wi-Fi profile and reconnect, entering the correct credentials
  1. Delete the existing Wi-Fi profile and reconnect, entering the correct credentials
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors
03Verify the RADIUS server certificate is valid
  1. Verify the RADIUS server certificate is valid
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors

Possible causes

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