Online Bill Payments
All major internet browsers (e.g. Chrome, Internet Explorer, Firefox) are changing the way that they validate website security certificates to ensure the highest security level for users when making payments. As a result of this change, if you are using very outdated browsers on old computer, you may not be able to transact on your payment.
If you are impacted by this change, simply upgrade to an up to date internet browser which is strongly recommended to address this issue as well as for a number of other security and usability reasons.