Symantec released on Monday, Sept 21, 2009, the update to Symantec Endpoint Protection (SEP) that supports Windows 7 RTM.  If you are a corporate account you can download the software at their updates site:

https://fileconnect.symantec.com

You will need your serial number to get access to the product download. 

SEP version 11.0.5 has official support for Windows 7 and Windows Server 2008 R2.

I experienced the following error message while attempting to install the update:

“Pending system changes that require a reboot have been detected” 

Rebooting didn’t resolve this issue.  However, I did find on Symantec’s website a Knowledge Base article that explains the issue and a resolution.

1. Locate the following registry key:
   HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\
2. Locate the PendingFileRenameOperations registry value in the right pane.
   Note: If you do not find the PendingFileRenameOperations value in the location above, this error message can be generated if there are pending changes in:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentSetXXX\Control\SessionManager\PendingFileRenameOperations
   Note: This value may be hidden. Make sure that your user account has permissions to this key.
3. Delete the value date from the pendingfilerenameoperations registry value.
4. Attempt to install the SEP client again.

After clearing my PendingFileRenameOperations registry value, I was able to complete the installation of SEP v11.0.5 on my Windows 7 computer.