Perhaps reduce both your uploads & downloads speeds just very lightly in your settings.

Also consider this: Tip: Purge the Downloads Queue!

Keep your HDD well de-fragmented; de-fragment your HDD fortnightly or monthly (or even weekly.)

Make sure you have the latest Java. LW runs on Java & it is itself mostly put together using Java. There's also the option of Java 1.6 Beta which has had very good reports here & elsewhere. But it won't run with LW if you have any other java versions on your computer. So you'd need to uninstall those versions 1st. http://java.sun.com/javase/6/download.jsp JRE "Offline" version which is a 15.72 MB download. It might be worth a trial. You can always revert to Java 1.5 afterwards if it doesn't please/improve for you!