The company did not issue any updates in February, even though it had been scheduled to switch to a new system from this month onwards.
It gave no reason for this, apart from saying: "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 apologise for any inconvenience caused by this change to the existing plan."
This was the second time the search engine giant has released details of bugs in Windows for which there are no patches, the first being a zero-day exploit.
Additionally, a zero-day exploit is floating around, this being one that implements an SMB3 server and affects clients connecting to it.
Asked for comment about Google's actions, Microsoft responded: "Windows is the only platform with a customer commitment to investigate reported security issues, and proactively update impacted devices.
"Our standard policy is to provide solutions via our current Update Tuesday schedule."
Microsoft announced in August last year that it would be replacing its system of issuing detailed security bulletins along with separate patches on the second Tuesday of each month.
Instead, the company said it would provide a searchable database of support documents named the "security updates guide".
The company also said there would be cumulative updates for both Windows 7 and 8.1, from this month onwards. Windows 10 has had cumulative updates from the time it was released.