Endpoint Protection

I received an error after installing SEP 11.x, I recently uninstalled NAV corporate, which was recieved from the DOD. I recieve a core error message failing to install due to a missing core file Windows XP 5.1.2600 Service Pack 3 Common Client Core 103.0.7. I have looked at past messages and posts, is there a patch or file by now that can be run to fix the issue without shutting my systems down?

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Could not find install path for at least one component" error appears on a SEP client after LiveUpdate

http://service1.symantec.com/SUPPORT/ent-security.nsf/docid/2010040109410348

Symptoms: 
An error message appears at startup and several times throughout the day which might look like:
1st Box: Common Client Update - The Update was not completed
Details Box: Windows XP 5.1.2600 SP2, Common Client Core 103.0.7
Could not find install path for at least one component.

https://www-secure.symantec.com/connect/forums/unable-find-installation-path-windows-xp-512600-service-pack-3-during-update-process

The product.inventory.liveupdate file needs to be replaced with one that has only the installed products on that machine. This can be done by copying a correct file from another computer with the same products.

If none is available, LiveUpdate can be uninstalled from Add or Remove Programs (or Programs and Features).
Delete C:\Documents and Settings\All Users\Application Data\Symantec\LiveUpdate.
Delete C:\Program Files\Symantec\LiveUpdate if it is still there.
Install LiveUpdate from LUSetup.exe from the SEP folder of the installation files.
Run a repair on the Symantec Endpoint Protection client from Add or Remove Programs to register the client with LiveUpdate.
The product.inventory.liveupdate file will now only have Endpoint Protection client listed.

I think the old NAV not removed completely, you can Run some removal tool like clenwipe and try to re-install.