Which isp do you go through?
Is this a new problem & if yes, at what point did it start happening?
Did you install new software over that time?

Set your search preferences to show all qualities & all connection types & set simultaneous searches to at least 5.
Go to LW's prefs>Speed & disable Ultrapeer capabilities.
Downlds>make sure there's several slots open.

Search for something like Let it be or beatles.

ALso try downlding a magnet link from here: http://www.magnetmix.com/video.shtml