Try disabling the performance options in Tools -> Options -> Advanced -> Super really advanced -> performance.

If still no good, delete the preferences folder however make a backup of the downloads.dat file; http://www.gnutellaforums.com/genera...der-vista.html

If still problems, check how many versions of Java you have installed. It might be worth downloading the most recent offline java version, then removing old versions & installing the offline version, reboot computer.

Oh .. also make sure that LW is set to run as Admin. It might also be worth changing compatibility mode of LW to XP & see if that helps.