How to Remove Expired Certificates - Windows

Can't connect to wireless, but you were able to in the past? You may have expired certificates. Follow the below steps to get connected again.

This is advanced troubleshooting. If you do not feel comfortable following these steps, please bring your device to the ITS Service Desk and we can assist you.

1. Remove saved networks.

  • Go to Settings Network & Internet > Wi-Fi > Manage Wi-Fi Settings > Manage Known Networks

    Settings
    Network and Internet
    Manage Wi-Fi Settings
    Manage Known Networks
  • Select WiFi Setup, then click on Forget. Next, select SecureMustangWirelessthen click on Forget.

    Forget Wi-Fi Setup
    Forget SecureMustangWireless

2. Remove saved computer certificates.

  • Search for "certificates".
  • Open Manage Computer Certificates.

    Computer Certificates
  • Click Action, then Find Certificates.

    Find Certificates
  • Search for “thawte” in the search box and click on the Find Now button.
  • Select and delete all found certificates.

    Delete Certificates
  • Search for “clear” in the search box and click on the Find Now button.
  • Select and delete all found certificates.
  • Close window.
  • Search for “netadm” in the search box and click on the Find Now button.
  • Select and delete all found certificates.
  • Close window.

3. Remove saved user certificates.

  • Search for "certificates".
  • Open Manage User Certificates.

    User Certificates
  • Click Actions, then Find Certificates.
  • Search for “thawte” in the search box and click on the Find Now button.
  • Select and delete all found certificates.
  • Search for “clear” in the search box and click on the Find Now button.
  • Select and delete all found certificates.
  • Search for “netadm” in the search box and click on the Find Now button.
  • Select and delete all found certificates.
  • Close window.

4. Restart computer.

5. Re-connect to wireless using WiFiSetup or connect directly to SecureMustangWireless.

Connect to Wi-Fi

Get Help

ITS Service Desk
Monday-Friday 8 a.m. - 5 p.m.  
Location: Natatorium (No. 46), across from Spanos Stadium 
Phone: 805-756-7000
Email: servicedesk@calpoly.edu

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