Here's an Easy answer...
As JL-S stated that SEP 12 would have been a better option for such a network... I completely agree with him...
However, since its purchased... the Best thing to do is go though the KB articles and work on DO IT Yourself ... or Call Tech support
( Please contact Symantec on your local support phone number found in the URL below.
http://www.symantec.com/enterprise/support/contact_techsupp_static.jsp
)
If I am not mistaken you have a WorkGroup environment, isnt it???
If Yes,
Best Practices for Central Deployment and Management of Symantec Endpoint Protection (SEP) in a Workgroup environment
http://service1.symantec.com/support/ent-security.nsf/854fa02b4f5013678825731a007d06af/ffc28ff652de8ee965257536005ef92c?OpenDocument
How to install Symantec Endpoint Protection in a workgroup environment
http://service1.symantec.com/support/ent-security.nsf/854fa02b4f5013678825731a007d06af/3bcb9bb4967c335e882574aa0019cce4?OpenDocument
If No, then its a Domain environment...
Check the KB Articles belo which would help you better....
1) Migrating to Symantec Endpoint Protection 11.0 MR4
http://service1.symantec.com/support/ent-security.nsf/854fa02b4f5013678825731a007d06af/2bec0308fcd83d2f882575220071b968?OpenDocument
2) Migrating to Symantec Endpoint Protection 11.0.4202 (MR4 MP2)
http://service1.symantec.com/support/ent-security.nsf/854fa02b4f5013678825731a007d06af/42ba1f162fe0652f882575bb0047cea4?OpenDocument
3) Creating client installation packages
http://seer.entsupport.symantec.com/docs/305173.htm
4) Creating new Client Installation packages in the Symantec Endpoint Protection Manager Console
http://service1.symantec.com/support/ent-security.nsf/854fa02b4f5013678825731a007d06af/50aa9c0639f6edc08825731e0081a6ae?OpenDocument
5) Creating custom Client Installation packages in the Symantec Endpoint Protection Manager Console
http://service1.symantec.com/support/ent-security.nsf/854fa02b4f5013678825731a007d06af/c741ec26fa674b1e8825738a0076abf3?OpenDocument
6) How to Deploy Symantec Endpoint Protection to your client computers using the Migration and Deployment Wizard.
http://service1.symantec.com/SUPPORT/ent-security.nsf/docid/2007111409432848
Once again there is a better way to upgrade all the Clients whether they are on Domain or Workgroup Environment...Here is the Auto Upgrade Feature.......in the SEPM....
To migrate client software
- Log-on to the newly migrated Symantec Endpoint Protection Manager Console if you are not logged on.
- Click Admin > Install Packages.
- In the lower-left pane, under Tasks, click Upgrade Groups with Package.
- In the Welcome to the Upgrade Groups Wizard panel, click Next.
- In the Select Client Install Package panel, all existing client packages are listed in the drop down box. Select one of the following:
- Symantec Endpoint Protection <appropriate version>.
- Symantec Network Access Control <appropriate version>.
- Click Next.
- In the Specify Groups panel, check one or more groups that contain the client computers to be migrated, then click Next.
- In the Package Upgrade Settings panel, check Download client from the management server.
- Click Upgrade Settings.
- In the Add Client Install Package dialog box, on the General tab, specify whether or not to keep existing client features or specify new ones, then configure a schedule for when to migrate the client computers. Under the Notification tab, if desired, specify a message to display to users during the migration.
- If the clients in the group run a version of Symantec Endpoint Protection previous to MR3, turn off scheduling. Scheduling is on by default when a new client install package is added to a group. If scheduling is turned on, the upgrade fails. To turn off scheduling, in the Add Client Install Package dialog box, uncheck Upgrade Schedule.
- For details about settings on these tabs, click Help.
- Click OK.
- In the Upgrade Groups Wizard dialog box, click Next.
- In the Upgrade Groups Wizard Complete panel, click Finish.
I hope that answers your Question to the Point...
And please dont be afraid of Symantec Endpoint Protection... its far more easier Software than you think..its just a mind set which you have when you are facing a new Software...as soon as you have a hand on on Symantec Endpoint Protection you would find it easier... :)