This is basically a bug fix release without a whole lot of added features. .
In the Remediation-Wizzard select the defined Upgrade-Baseline: After clicking Next accept the eula.Login to the vCenter Server with the vSphere client and click "Plug-ins" and then "Manage Plug-ins.".Open Home and Clusters and select the Cluster with the ESXi Hosts you want to upgrade.If necessary select the check box: Now you can specify a task name and schedule the remediation if necessary: After clicking Next you can define some maintenance mode options: An last but not least you can define some cluster remediation options: Check the Ready.KB article found here, it seems like there are a ton of steps, but it's actually pretty easy once you get comfortable with the Update Manager interface. .
Step 2: Import ESXi Image into Update Manager.
The next window enables you to remove installed third-party software that is incompatible with the update.
There is a pre-defined Baseline called "Critical Host Patches" under Attached Baselines. .
There are various options that you can select as well, but often aren't necessary. .While this is downloading you'll want to take note of the name of the DSN you're currently using and the username and password being used to access. .But did you know that you can use VMware Update Manager, too?Again, put a checkmark next to the Critical Host Patches Baseline. .Now it's time to upgrade the ESXi hosts using vSphere Update Manager by following these steps: Open the vSphere client, highlight one of your ESXi hosts and click on the Virtual Machines tab.Depending on the last time you did patches you may see several patches listed in the bottom pane under the Patches heading. .