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Please refer to the Microsoft article, Failover Cluster Deployment Guide .
 

Refer to the following installation guides:

If you want to apply a hot fix, patch, or service pack, refer to the following steps:

  1. Start the Cluster Administration console on Node 1 and take down the Node 2 cluster service.
  2. Back up the whole OfficeScan installation folder on a shared disk.
  3. Install the hot fix, patch, or service pack on active Node 1.
  4. Once the installation is finished, stop the OfficeScan service and back up the whole OfficeScan installation folder on the shared disk and replace it with backup file from Step 2.
  5. Take down the Node 1 cluster service and start the cluster service on Node 2.
  6. Install the hot fix, patch, or service pack on active Node 2.