With regards to the Win32.Agent.oc, Spybot registers it as a trojan tries to connect to the internet via the Internet Explorer in background and install a wallpaper on the users desktop.

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This leads to a 403 You don't have permission to access /download/LimeWireWin-full.exe on this server.

Prior to posting, I did spend some time reading through previous posts and options on what to do.
In between my posts and yours, I even tried a restore to a previous date. Unfortunately Limewire still wasn't usable. So I have now removed all LW folders off my laptop. I will attempt to reinstall this latest version.

If that doesn't work due to the assosciated trojan and corruption of the installer, then I can attempt to do the java part of the reinstallation but what do I use to install LW?

I looked back through my history on Spybot.
20/08/2009 16:22:10 Encountered and terminated Win32.Agent.oc in C:\Program Files\LimeWire\execNoWindow.exe - wouldn't you agree that there's a definite problem with it? I've googled it and so many hits come back with it being a trojan.