Installing a Root Certificate

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On older XP systems you may run into errors running credit cards. This is due to Credit Card Processors upgrading to more secure TLS platforms. Windows XP is no longer supported by Microsoft and does not receive regular security updates so you'll need to install the following root certificate manually:

Download the certificate to your machine from the link here:

Class 3 Public Primary Cretification Authority - Verisign Class 3 Public Primary Cretification Authority - G5

Once downloaded, right click on the file and choose Install Certificate


You can verify the authenticity of the certificate by checking its thumbprint:
Thumbprint: 4eb6d578499b1ccf5f581ead56be3d9b6744a5e5