Try changing Java versions. You can either update to the latest version here: Java SE Downloads
or, if the latest update doesn't help, try this older version: Archive: Download Java 2 Platform Standard Edition (J2SE) 5.0 Update 11
Whichever Java version you use, download the JRE offline installer & remove any other Java versions before installing another one.

If changing Java doesn't help, delete LW's preferences folder when LW's properly closed.
This will change 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.
Vista users: LimeWire Pref Folder in Vista

ive tryed that 3 times and it has never worked cheers any way

looks like i will have to build a xp computer

Did you try uninstalling ZA?

Have you tried the latest stable release (4.16.6) or the latest Beta (4.17.4)?
See whether they're any better (sometimes it's just that certain versions cause problems for some people, but a different version will work fine).

Have you been able to use any earlier versions of LW with Vista? If you haven't tried an earlier version, here's a link to download 4.14.8...see whether that one loads.
LW Basic 4.14.8.exe

that worked spot on down loaded lw basic 4.14.8 and not a problem thank you very much