After LW's been open at least 20 mins, do this test: Bug Report instructions & sample image Is it True/False?

To reduce drag on LW:
1. Tip: Purge the Downloads Queue!

2. After opening LW wait 10 to 20 mins before using. Let it settle down 1st.

3. Go to LW's prefs>Speed & tick disable Ultrapeer Cap. & press apply button.
Set both uplds & downlds to autoclear.
Close all LW windows you don't need open at that time.
If you're not in front of your comp, then hide LW in the background or Task bar.
Reduce uplds to about 70-80% or more. Reduce downlds to 80 or 90%.

4. Also don't use the Resume button on all incomplete files. 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. This functon can have side-fx & tends to be over-used by many people.

5. If I find a downld slows then I'll re-search it. This can re-energise it. Also stopping it from the downld window & re-selecting from the search results can have the same effect. (I also try not to downld too many files at one time.)