What video card brand & model & set-up do you have? What firmware versions?
Try these things:
1. Try deleting your LW Preferences folder whilst LW is
closed; instructions here:
Point #2 & 3 in Fixes for Limewire (sample image included at bottom of page.)
2. Make sure you have Java 1.5. Also try changing LW compatibility to either Windows 2000 or NT as in step 5 here
Fixes for Limewire
3.
Tip: Purge the Downloads Queue! & apply on files 0% downld status & 0-50 KB in size.
4. Go to LW's menu bar, Tools>Options>Speed & tick disable ultrapeer capability & press apply.