You want to know how to manually uninstall Live Update Administrator 2.1 or later LUA versions Or getting error code 1720 ,There is a problem with this Windows Installer Package while removing through Control panel.
Windows installer is corrupt on affected machine & unable to proceed with application uninstallation because of this.
If using the control panel's Add/Remove programs does not work when you are trying to uninstall Live Update Administrator, the below registry entries and file/folder locations should be deleted after stopping the program's services:
5. Press the Enter key
6. In the command window, type the following text:
7. Press the Enter key, then close the command window
Remove Symantec LiveUpdate Administrator from the registry
Most of the items that you must remove are entries in the Windows registry.
Note: You must have administrator permissions (read and write) to edit the registry.
WARNING: In the next steps you will edit the Windows registry. Back up the registry before you make any changes to it, because incorrect changes to the registry can result in permanent data loss or corrupted files. Modify only the registry keys that are specified.
For instructions, see How to back up the Windows registry.
To remove Symantec LiveUpdate Administrator from the registry
Remove Symantec LiveUpdate Administrator from the hard drive
After Symantec LiveUpdate Administrator is disabled, you need to remove leftover files to the program.
To remove Symantec LiveUpdate Administrator from the hard drive
3. Close Windows Explorer
This would completely remove LUA from affected machine.