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To remove/add the old/new ORC ECA CA Signing Certificates via Internet Explorer:

In Microsoft Internet Explorer

1. Select 'Tools - Internet Options...'

2. Select the 'Content' tab and then the 'Certificates...' button.

3. Click the 'Intermediate Certification Authorities' tab.

4. Scroll through the intermediate CA signing certificates until you find ORC ECA.

5. Use the mouse to select ORC ECA (if you see multiple instances of ORC ECA, select all instances of ORC ECA while holding the 'Control (Ctrl)' key on the keyboard, then click the 'Remove' button.

6. In the Certificates window click the 'Yes' button.

7. In the Certificates window click the 'Close' button.

8. In the Internet Options window click the 'OK' button.

9. In the Internet Explore address box, enter http://eca.orc.com.

10. On the ORC ECA page, select menu item 'ECA Repository', then 'CA Signing Certificate'.

11. At the File Download window click the 'Open' button.

12. At the Certificate window click the 'Install Certificate...' button.

13. At the Welcome to the Certificate Import Wizard click the 'Next >' button.

14. At the Certificate Store window click the 'Next >' button.

15. At the Completing the Certificate Import Wizard widow click the 'Finish' button.

16. At the Import was Successful window click the 'OK' button.

17. In the Certificate window click the 'OK' button.

18. On the ORC ECA page, select menu item "Certificate Tools", then "Certificate Test".

19. Authenticate to the Test page. If you receive "You possess a valid Certificate." Then everything is installed correctly in Internet Explorer.