See Supported operating systems for Workflow .
If your Workflow environment does not meet the system requirements, you need to perform a clean install.
See Installing Workflow.
To upgrade Workflow
Download the Workflow Installer to your Workflow computer.
In the Symantec Management Console, on the Manage menu, click Workflows.
In the left pane, expand Workflows and then click Download Workflow Server and Designer.
In the right pane, in the Downloads section, click Download Workflow Server and Designer.
Save the Workflow Installer to your computer.
Run the Symantec.Workflow.Setup.exe.
In the Open File - Security Warning dialog box, click Run.
On the License Agreement page, click I Agree.
On the Maintenance page, click Upgrade and then click Next.
The Workflow Installer interrogates your Workflow computer and uses that information to populate the pages of the installer during upgrade.
On the System Check page, review the results of the system check to verify that you meet all the installation requirements. When you are finished, click Next.
On the Ready To Install page, click Install.
Symantec does not recommend modifying your information during upgrade. If you do, your Workflow system may not operate properly after upgrade.
On the Installing page, you can view the upgrade status.
After the wizard displays the Installation Finished Successfully message, click Finish.
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This will clear the history and restart the chat.