Speeds are generally due to the hosts you're downloading from. So this speed can vary. Sometimes one of the faster hosts you're downlding from might have shared with a few more people so their bandwidth available to you is less.

But the problem might also be ISP related. Try an experiment with downloading a magnet link from here & see if it's consistent speeds: http://www.magnetmix.com/video.shtml

It's from a site so speed should be very fast & consistent. If not, particularly if it starts off fast but then drops to very, very low, then your ISP is shaping you (filtering your speeds whilst you're using LW.)

I didn't see your last post when I posted. You could try closing & re-opening LW to see if you have same problems.

Are you using DSL or ADSL? ie: are your download speeds affected by your upload speeds? If yes then it's DSL. If not, then it's ADSL. eg: dial up modem users are DSL so to speak. But some high speed plans are also DSL.