It just gets confusing if there are 2 topics going in the thread Next time, just start a new thread in the appropriate section.

Have you just downloaded LW, or have you had it for a while but it's just stopped opening?

Try removing your version of Java & reinstall using the offline installer. Then try deleting the LW preferences folder. Instructions for both are in the thread below
Fixes for LimeWire
If that doesn't help, download LW again using it's offline installer... see the link in one of my other posts here. You could also try changing compatibility to Windows 2000 or NT (see Fixes for LimeWire).

If you're using any antispyware, make sure that LW's added to the list of exceptions/allowed apps. Some antispy will see LW as a threat & so stop it from opening/running. If in doubt, disable the antispyware & see if LW will open.