Good news that your incoming test is True. How much RAM do you have?

Roughly how many files do you share & also how many incomplete files? (Just approx.)

You can try reducing upld speed to 50%. Do you know what your upld speed is according to your package? (2mbps downld, but upld?)

Try not using the Resume function or Find Sources button for your files. This will use a lot of LW & System resources & slow your computer down. Also allow your computer to settle down before doing anything. Depending on how many files you're sharing & how many incomplete files, LW can take some time to settle down.