Are you low on disk space? Check out the thread below for more info & fixes to try. Start off by defragmenting your HDD.
http://www.gnutellaforums.com/downlo...k-problem.html

Even though the files say 'complete'...have a look in LW's library > incomplete files & see whether they're showing. If they are, you can try highlighting the file & clicking Resume, after you've tried some of the fixes. Some people have been able to resume files & some haven't...I never could.