Hi codyw,
Kindly do the following:
1. Uninstall Liveupdate 3.3 from add/remove prog, in control panel.
2. Delete the Liveupdate folder from C:/program data/Symantec...You may have to enable show hidden files and foldwers from control panel-Folder options-tools-View to see program data folder)
3. Also, delete Liveupdate from C:/program files(x86)/Symantec, if present.
4. Now try to install SEP