Don't uninstall LW using your add/remove control panel or you'll get into all types of bother.
Use the Start menu > Programs > LW > Uninstall. Use the "Offline" LW installer to reinstall.
If you uninstalled LW using the Add/Remove control panel then that's why you're having problems. Not for 2 years has LW been able to be uninstalled properly using the add remove control panel because it uses a different type of installer.
If you used the add/remove control panel to uninstall LW then you'd better tell us.