Have you tried right-clicking program change compatibility mode, for XP or earlier, choose Windows 2000 or NT compatibility, if using Vista choose Windows XP compatibility. And setting LW to 'run as' Admin. Steps 5 & 6 in Fixes for LW thread.

If you have totally removed, cleaned the system of both Java & LW, then reinstalled both using Offline installers, & have also deleted the LW preferences & still problems, then there may be something on your system that is conflicting with LW. It might be Alcohol or something else on your system, perhaps a conflicting toolbar (this can be an issue too) or newly installed files somewhere. Perhaps Direct X or Video card drivers need updating. Perhaps View mode needs changing under compatibility. These are all things to try.

Did you purge your incomplete files? Not share any files initially?

LW 5 needs Java 1.6 64-bit, will not function properly with Java 1.6 32-bit.