Are the GeoTrust root CA certificates pre-installed in popular web browsers?
Yes, you will see the GeoTrust roots listed as Equifax. GeoTrust owns the Equifax roots. In Internet Explorer, from the top menu, go to Tools > Internet Options then select the Content tab. In the Certificates section click the Certificate button and then select the Trusted Root Certification Authorities tab. Scroll down in the list to see the Equifax root certificates pre-installed.