I switched off my ibook last night only to start it up this morning to find that I'd lost my desktop settings and amongst others, Limerwire had gone AWOL.

I've tried to reinstall Limewire but get the 'no mountable file systems' message. This also happened when I tried to install Flash player.

Can anyone tell me what's happened. I've just rebooted and again I've lost my personalised settings. Could it be that I've picked up a virus?

FYI I'm running OSX 10.3