If the vCenter Server or its service happen to fail or restart during the VCS installation, the vSphere Client displays "Error" as the installation status. However, the guest components installation may continue on the virtual machines.

Workaround: After the vCenter Server or its service restarts, click on each of the selected virtual machine and verify if the Symantec High Availability tab appears in the vSphere Client.

Presence of the Symantec High Availability tab indicates successful installation of the guest components. However, if the Symantec High Availability tab is not present, refer to the Symantec High Availability logs for installation details.