"We will deliver updates as part of the planned March Update Tuesday, March 14, 2017.
"Our top priority is to provide the best possible experience for customers in maintaining and protecting their systems. This month, we discovered a last minute issue that could impact some customers and was not resolved in time for our planned updates today.
"After considering all options, we made the decision to delay this month's updates. We apologize for any inconvenience caused by this change to the existing plan."
I asked officials tonight for more information about the reasons for the delay and was told the company had no comment beyond what's in the statement above.