You can download all software bulletins. However, Symantec recommends that you download only the bulletins that the target computers require. On the Patch Remediation Center page, in the compliance reports, you can view how many computers require an update.
After the updates are downloaded, you can create a software update policy to distribute the updates to managed computers.
When you choose to download a software bulletin, a task is created that downloads the associated software updates. You can view the status of this task to troubleshoot the download of software updates.