nothing happens (LW not opening)
 

okay, ive downloaded the latest version of limewire, and when i click on it, the hourglass appears for a fraction of a second beside the cursor, and nothing happens. I've already tried removing java and then downloading that link that someone keeps replying to posts like these, but there's no difference.. So how can I fix it?! :bangh:

So you installed JRE 1.5.0_11? Did you remove all other Java versions from your computer?

Try deleting LW's preferences folder when LW's properly closed. See point 3 here & also point 2 if you've used older versions of LW in the past (there could be a folder in either location).
Fixes for LimeWire
This will kill all of your settings within options, you'll have to go back through afterwards & reset things. If you're not sure of your settings, go through LW's tools > options & write them all down, so that you can reset things later.
LimeWire Pref Folder in Vista

If it's still not opening, try changing compatibility (point 5 in the 'fixes' thread). If you're using XP, try compatibility mode for Windows 2000 or NT. If you're using Vista, try compatibility mode for XP.

Otherwise, reinstall LW & make sure to use the offline installer (when you click to download LW & a dialog box pops up, cancel that & you'll see an option to download the offline installer).