How did you uninstall LW? Should only do it via Start menu -> Programs -> LW -> Uninstall.
Then run this utility: Crap Cleaner

Then use this version: Download ‘Other’ version & simply unzip & use!

* You need to be sure you have Java installed. Also online installations of Java are often corrupted, so best to use the OFFLINE installers for Java for safety. Also some versions of Java run better on some people's computers than other versions.