we have SureReplica in our software that is designed exactly for this:http://helpcenter.veeam.com/backup/80/v ... plica.html
However you said you have the Standard edition, while SureReplica is available in Enterprise and Enterprise Plus editions, so probably you already looked into this.
If you have automatic windows updates, my best suggestion is, together with replicas, to also have backups of those VMs and be sure they are successful BEFORE any windows update operation starts. If the VM is corrupted by windows update, you will restore the VM from the latest backup. With instant VM recovery (this one available also in the Standard edition) you will have the VM back online quickly, and then you will re-align the replica from the restored VM.
Another option could be to temporarely disable replications during a windows update, so possible issues are not replicated, especially with such a short retention (we are talking about just 3 hours with 6 points every 30 minutes...)