Reduce your downld bandwidth to about 80-90% & your upld bandwidth to about 75-85% & see if this makes any difference. Also disable ultrapeer capabilities. Go to Tools>Options>Downlds & Tools>Options>Uplds>Basic & Tools>Options>Speed to find these options.
Also see these hints:
* After opening LW wait 10 to 20 mins before using. Let it settle down 1st.
* Set both uplds & downlds to autoclear.
* Don't use the Resume button on all incomplete files. This can have side-fx such as affect LW's connection quality. May queue your files for much much longer. This will also stress LW & your comp. If you use Resume/Find sources then just apply it to a couple or so at one time.
*
Tip: Purge the Downloads Queue!
* If still problems after applying the above then try reducing your share if you share multiple thousands of files.